manolonte

Flying Cloud – overdrive with its own tone in a 1590A enclosure

May 16, 2018August 24, 2018 manolonteLeave a comment

This new project is based on that archi-known japanese green overdrive. It is different in the component values (as many clones over there) and in the absence of tone control.

It all began as a simple overdrive circuit to be hidden inside a stratocaster, and it lived like that for a couple of days. For that purpose I didn’t need a tone control, because the guitar has its own one, and the amount of distortion was controlled by one of the strat pots (the middle one), while the other tone pot was controlling the tone of all pickups and also of the overdrive circuit.

After trying the concept, I didn’t like the idea and removed the artifact from the guitar. But I liked the tone and tested it as an independent effect, even without the tone stage. Also, it would fit inside a 1590A enclosure, hence being a very practical device as a backup for my regular overdrive pedal or to be carried to jams or occasional gigs.

Here is the pcb (veroboard) after leaving its guitar life and before starting to be an effect pedal:

And the schematics:

As you can see, it is basically a thatjapanesepedalthateverybodyhascloned but there is no tone stage. Compare with: https://www.electrosmash.com/tube-screamer-analysis

I can live without tone control, because almost all electric guitars has at least one tone control, I have an equalizer pedal and all amplifiers have a tone stack. I have adjusted the tone in the circuit to my preferences, but some components can be changed to shape the tone. On the other hand, the tone stack can be missed if you have other effects after this one that can be affected by its tone (stacking overdrives, phasers, etc).

Of course, feel free to use the concept and the schematics if you like it. If someone needs the veroboard layout I can prepare it and publish it also. Just buy me a beer and we’re even 🙂 I’m planning to record a demo for this pedal in the following days.

And why the name? The Flying Cloud was a fast clipper that sailed the seas in the XIX century. I like ships and this pedal is also a fast clipper (a soft clipper, to be more exact).

PD: the 220nF capacitor at the output of the operational amplifier can be removed for a less muddy sound. It is included in the original green overdrive and I had to included it at first in order to avoid oscillation with an LM348 as operational amplifier. After switching to 4558 kind of IC, the oscillation is not present even in abcense of that capacitor.

LM358 has a slew rate of 0.3V/uS, while JCR4558 has a slew rate of 1V/uS, which I think is the cause of that difference.

EQD Tentacle clon in 1590A enclosure

May 12, 2018May 17, 2018 manolonte1 Comment

Mission acomplished! I managed to fit an octave pedal in a 1590A enclosure. It is not hard because you don’t have any potentiometers at all. That’s why I chose this effect to be my first 1590A project. It sounds great, by the way, thanks to the guys in tagboardeffects for the layout:

http://tagboardeffects.blogspot.com.es/2016/11/earthquaker-devices-tentacle.html

In order to save space, two rows have been omitted from the layout, so it is 19×9 instead of 19×11. There are two rows with no components, they can be saved by using small resistors and ceramic capacitors.

I have put the octave after wah and compressor and before overdrive, not sure if that is the right place, let’s give it a chance.

BOSS FW-3 Mods

May 8, 2018May 20, 2019 manolonte1 Comment

I have a BOSS FW-3 pedal bought in the 90’s when I started to play guitar, looking for a Jimi Hendrix or SRV sound. Why this pedal instead of a Cry Baby or VOX? Because back then you bought what they had in the shop.

Some months ago I decided to sell it because I didn’t like its sound and behavior any more. Too subtle when placed before dirt and too uneven in volume when placed after. But nobody seemed to be attracted to this squared tank in spite of the low price I asked for it, so I kept it.

It is not a bad product compared to other wah pedals, it is just you get sick of the same tone and problems, and want to get a different tone (and problems). In fact I like its size and robustness, it is solid like a tank and fits very well under my feet.

So I decided to tweak it a bit in order to find a different sound, and started to look for possible mods in the web: nothing at all.

After studying its circuit, I found that the BOSS FW-3 wah pedal is essentially a modded Cry Baby. A very clear and in depth analysis of the Dunlop Cry Baby can be found here: http s://www.electrosmash.com/crybaby-gcb-95

There is plenty of information about mods for Cry Baby. In many sites they talk about these particular mods, in Cry Baby terminology, for a GCB-95 PCB:

True bypass (more details in the referenced sites)
Mid range response: R1 resistor change from 1.5K to 2K-2.7K
Q: R5, from 33K to a bigger value, up to 100K. This mod is already done in a BOSS FW3, there is a pot in the pedal panel for adjusting this value.
Sweep Range, change C5 from 0.01uF to a bigger value for lower frequencies and a lower value for higher frequencies range. Typically 0.068uF for a bass wah.
Gain and bass response: changing R9 from 390 to a lower value will raise gain and add bass content, while a higher value will reduce the gain

In order to apply this valuable information to modify a FW-3 and find our personal tone, we need to map these components to those found in the BOSS PCB. I didn’t fight with the true bypass mod because I like the BOSS buffer, and it is useful for me in most situations.

From the schematics:

Mod	Cry Baby (GCB-95)	FW-3
Gain	R9	R6
Sweep range	C5	C12
Mids response	R1	R4

See below the pictures for FW-3 pedal PCB. In the top picture I have marked these components in the board.

Which values to choose depends a lot on your personal preferences. I have experimented with some values and ended choosing these ones:

R4 (Mids): 2.2K, gives some more mids content.
C12 (Sweep range): .022uF, lowers the sweep range in the frequency spectrum, giving a very pronounced WOOOO effect in the lower frequencies end.
R6 (Gain): 390. It lowers the gain a bit, making it more even with the effect not engaged

These values give a very personal tone to the FW-3 wah. Even placed before dirt, the effect is very pronounced and significantly different from the original, specially in the lower end of the sweep range.

In a next post I will try to record the sound of the modified pedal.

I’m planning to add some pots in the future to regulate the mids and gain, and even a selector to change among different values for C12. The unit has space in the panel to place the pots and enough space inside to place another two PCBs, so I think it is a perfect platform to play around a bit.

References

http://stinkfoot.se/archives/549

http://www.wah-wah.co.uk/diy.html

https://www.electrosmash.com/crybaby-gcb-95

PD: si hacéis ese mod, ponedlo en los comentarios abajo. Me gustaría saber si la gente disfruta (o no) de mis mods.

POP: Autoovation feature

December 17, 2016 manolonteLeave a comment

Now POP has a new feature, that I call “autoovation”. You start playing with your favorite effect, and when you stop playing, sometimes, if the pedal likes your performance, you hear an ovation from a digital audience.

Autoovation is made basically by detecting audio activity in input, then waiting for silence and playing a file randomly from a list of mp3 recorded ovations. For audio detection, silentjack (https://www.aelius.com/njh/silentjack/) was used (thanks Nicholas J Humfrey for your work and for letting me add a feature to your code).

This feature is just a joke, of course, but gives an idea of the kind of things that can be done with a device like this one. Think about things like backing tracks, automated rythm boxes, etc.

POP: noise reduced and schematics uploaded

November 19, 2016December 29, 2016 manolonteLeave a comment

After cabling audio internally with shielded wires, and solving a grounding problem in the input jack, noise has been reduced drastically when working from battery. There is still an annoying computing noise when connected to an external 9V power supply. I am going to put a removable ferrite bead, still waiting for the parcel to arrive.

I have also finished schematics for the project, that have been uploaded to https://www.hackster.io/manolonte/pop-programmable-open-pedal-9acddf

popv1-0_esquematico

Next steps:

Trying with ferrite bead
Adjusting output volume, too high right now
Giving a function to second switch, maybe fast reset for changing mode quickly
Reducing latency
Creating new effects: some ideas:
- dubbler
- auto-ovation: just for fun, when you stop playing, simulate an audience ovation, just like in “Blues Deluxe”, from Jeff Beck Group
- tremolo, phaser, etc.

POP: Programmable Open Pedal, first test

November 15, 2016May 7, 2018 manolonteLeave a comment

First recordings of POP through a Fender Blues Deluxe 40W AB tube amplifier. Camera is a GO Pro HERO. The amplifier is looking towards the wall in order to save our ears. Guitar is a Yamaha Revstar 420, I love it.

Impressions

Sound quality looks promising, though still I can hear some computing noise, specially when configuring a compressor or a distortion/overdrive. When using delay type effects, or reverb, noise is quite bearable.

I am using a 512 bytes buffer, and getting around 20ms of latency, still too much.

Some more research is needed to get the best from this unit, keeping in mind the limitations: CHIP board works at 1GHz, and sound card is integrated in the SoC, as long as I know.

Stay alert for new tests.

I have also still to publish some documentation about the project. More details can be found here: https://www.hackster.io/manolonte/pop-programmable-open-pedal-9acddf

https://www.hackster.io/manolonte/pop-programmable-open-pedal-9acddf/embed?use_route=project

Please leave any feedback you consider relevant or funny.

POP: Programmable Open Pedal

November 13, 2016November 15, 2016 manolonteLeave a comment

What is POP?

This is my most recent project. Based upon the C.H.I.P. board form Next Thing Co, I have built a stompbox guitar digital pedal. These are its main features:

stereo output
true bypass
standard 9v input
three modes of operation
reset/shutdown button (the red one)
additional programmable button (the black one)
wifi, enabled inly in one of the modes
microusb input, for serial connection
USB input, where you can connect a MIDI controller, so effect parameters can be modified on the run
backup battery, so if you unplug the unit, you have the chance to shutdown gracefully

C.H.I.P board offers a good opportunity to build this kind of units because it has audio capture capabilities natively, without the need to plug an external (usually slow) USB sound card.

At this moment I am still doing tests, trying to improve sound quality. Some software stacks I have tested up to now:

Rakarrack on jack: unstable in this platform
Guitarix on jack: quite stable and very good sound quality, but a lot of CPU consumption. The good point is that you can configure and control the unit graphically, doing a SSH -X from a computer.
Supercollider on jack. Super-flexible, Supercollider is a programming language, so you can create any effect your imagination dictates. The problem is that I haven’t reached the sound quality I am looking for, maybe a SC expert can do.
LV2 plugins on jack, running with mod-host. With this combination I have got the best results, in a next post I will upload some sound clips. You can control parameters with a MIDI controller, and preset parameters. You can choose from a huge list of already programmed effects, and combine them in any order.

My current software configuration is based on LV2 on jack. I have programmed three modes of operation using the switch you can see at the right in the above picture:

switch up: double delay, controlling feedback and delay time of the two delays with a Korg Nanokontrol2 MIDI controller
switch middle: compressor, controlling attack, release and gain
switch down: reverb, controlling room dimensions and warmth. In this position, I activate wi-fi interface and sshd, so I can connect my computer and make changes, update the software, fix issues, etc.

Some advices for anyone looking for something similar:

WIFI

Wireless interface can be a problem if you enclose a computer inside an aluminium box, as is the case in this project. If you use a plastic box, you will have too much electromagnetic noise. For a compromise, I decided to drill a hole in the case, right above the wireless antenna. With an eight millimiters hole, and putting the unit not far from an access point, I am getting a quite good network access.

FAN

Another problem derived from the case is temperature. Without a fan, temperature was reaching 70 Celsius degrees. With a small 12V 25 mm fan, powered at 9V, temperature keeps stable at 51 degrees, even lower with wireless deactivated. I put the fun below the hole I had already done for wifi waves to escape the enclosure, as you can see in the pictures just below the switch.

JACK

I mean jack software. You have to compile it for no GUI, as they describe here: https://capocasa.net/jackd-headless

For the rest of the software (LV2, mod-host) I will write a dedicated article.

SOUND INPUT AND OUTPUT

I have got the best results using the minijack input for audio capture, and board connectors for output. I have grounded the audio capture and output with the board connectors and at this moment there is almost no computer noise.

POWER SUPPLY

My advice is to power the board using pin U13-2 CHG-IN, instead of powering it using the microUSB connector: it is discussed here: https://bbs.nextthing.co/t/chip-power-pins-maximum-current/7164/9.

I built a 5v/9v converter using a tipical 7805 IC, and fixed to the case with a screw. Don’t put the thing too close to the board.

FLASHING CHIP

With kernel 4.4, I got errors when capturing audio, so I sticked with kernel 4.3, until I can do some new tests or someone tells me it is fixed:

https://bbs.nextthing.co/t/dsp-with-c-h-i-p-and-audio-capture/6993/5

So I am very excited now with this project. My main concern now is sound quality and usability. I’ll write some additional posts with audio clips and new notes and advices. I would like to upload some schematics with the internals of the unit.

If someone is interested in more details about the project, or have some questions, please write some comments, or send me an email to manolonte@gmail.com.

The ugly, the good and the minor third

September 15, 2015September 15, 2015 manolonteLeave a comment

Why does a melody sound good to us, to some of us but not to others? Why does a song sound sad while another one sounds glad or awfully dissonant? I don’t know, of course, but it seems to have to do with evocation of known melodies, cultural conventions and something in our brain that is still to be discovered.

Some time ago I was curious about what kind of sound resulted from the addition of two notes in a chord or a melody.

Let’s consider a root note, let’s say A440, known to have a frequency of 440Hz. The sound will be a sinusoidal wave, something that would seem like a flute.

Now let’s add a perfect fifth. We’ll consider a perfect fifth to have a frequency = 3/2 of its tonic.

In black we have the tonic, in red perfect fifth and in blue the sum of both signals. What happened? The resulting sound is a signal with a frequency of 1/2 * 440Hz = 220 Hz.

Now let’s consider our A flute and an added major third. There are several standards for major and minor third frequencies related to tonic (see https://en.wikipedia.org/wiki/Major_third) but for this exercise I will take the just intonation, in which the major third has a frequency of 5/4 multiplied by its tonic frequency.

In black the tonic, in red the major third and in green the sum. Now we have a resulting signal of 1/4 * 440Hz = 110 Hz.

Now let’s add a minor third to the tonic. In just intonation, minor third has a relationship of 6/5 with its tonic frequency.

In black the tonic, in red the minor third and in green the addition of both. Now the resulting frequency is 1/5 * 440Hz = 88Hz

The last plot will consider a very dissonant note, a minor second, with a relationship with the tonic of 16:15.

The frequency of the resulting signal is 1/14 * 440Hz = 31.42Hz

Obviously, as the second note’s frequency approaches the tonic’s frequency, the resulting signal has a lower frequency.

Now let’s take a chord. A major chord will be something like this:

In black the tonic and in red the addition of tonic, major third and perfect fifth. The resulting signal has a frequency of 1/4 * 440Hz=110Hz.

Now with A minor:

Now the resulting signal has a frequency of 1/10 * 440Hz.

Let’s summarize the results:

interval/chord	frequency	note
tonic	440Hz	A4
perfect 5th	220Hz	A3
major 3rd	110Hz	A2
minor 3rd	88Hz	~F2-F#2
minor 2nd	31.42Hz	~B0-C1
A major	110Hz	A2
A minor	44Hz	~F1-F#1

Perfect fifth and major 3rd have a curious property: when you add them to the tonic note, you produce a signal whose frequency has the same frequency of the same note in a different octave. However, when you add a minor 3rd or a minor second to the tonic, the resulting signal frequency has no relationship with any note.

I hope you have enjoyed this mathematical experiment and that it will make you think about intervals in a different way. But above all, please enjoy your favorite music, either thinking about intervals or not thinking at all.

Samsung EVO 16GB MB-MP16D micro-SD card corrupted on Raspberry Pi 2 model B

February 11, 2015September 11, 2015 manolonte3 Comments

Yesterday, and today again, the micro-SD card got corrupted after a session of normal functioning and a shutdown or reboot. Root filesystem was formatted as ext4. After reading these sites:

I decided it was time to test f2fs filesystem with Raspbian on Raspberry Pi 2.

Migrating was easy, just format the partition as f2fs on Linux (you need f2fs-tools), and then copy the files with tar. There is no fsck.f2fs for Raspbian yet, but you can download the deb package from https://packages.debian.org/sid/armhf/f2fs-tools/download. Follow the instructions on the 1st link above in order to changes the root filesystem expected by kernel at boot (change it in cmdline.txt) and change filesystem in /etc/fstab as well.

Raspberry booted a while ago two times with this new configuration. I have just upgraded it and will give it a try for the whole day.

Raspberry Pi Model B vs Raspberry Pi 2 Model B

February 10, 2015September 10, 2015 manolonteLeave a comment

I have just received a new RPi 2 Model B. Yesterday I prepared a microSD card copying the three partitions of another SD card with Raspbian installed. The method was as follows:

– Partition the new microSD card with fdisk, same size except the last partition (swap) that was slightly smaller in the microSD.

– From my home computer, dd from original partition to final one:

# dd if=/dev/mmcblk0p1 of=/dev/sdb1 bs=4096
# dd if=/dev/mmcblk0p2 of=/dev/sdb2 bs=4096
# dd if=/dev/mmcblk0p3 of=/dev/sdb3 bs=4096

Raspbian was updated just before migrating the SD, so it has the last kernel and bootloader updates. uname -a reports:

Linux parpuja 3.18.5-v7+ #225 SMP PREEMPT Fri Jan 30 18:53:55 GMT 2015 armv7l GNU/Linux

Raspberry Pi 2 boots without any issue, faster than the previous model, as was expected.

Some pictures of the two models:

The only problem was the case. Since the new model has four USB slots instead of two, it does not fit into my homemade Video8 case.

I have some benchmarks made to compare the two models. I found some precompiled benchmarks for RPi ARM A6 here (thanks Roy Longbottom): http://www.roylongbottom.org.uk/Raspberry%20Pi%20Benchmarks.htm

Compiling the benchmarks from source code is not trivial because they include some assembler code for x86. Roy has source code adapted for ARM in his page.

The benchmarks are:

busspeed
dhrystone
linkpack
liverloops
memspeed
whetstone

The two models compared are:

Raspberry Pi B 2011.12 512MB

Raspberry Pi 2 Model B V1.1 2014

Benchmarks

 ########################################################

 Linpack Double Precision Unrolled Benchmark n @ 100
 Optimisation Opt 3 32 Bit, Thu Feb  5 11:17:03 2015

 Speed      41.37 MFLOPS

 Numeric results were as expected

 ########################################################

 ########################################################

 Linpack Double Precision Unrolled Benchmark n @ 100
 Optimisation Opt 3 32 Bit, Tue Feb 10 12:54:23 2015

 Speed     119.02 MFLOPS

 Numeric results were as expected

 ########################################################
SYSTEM INFORMATION

From File /proc/cpuinfo
processor	: 0
model name	: ARMv7 Processor rev 5 (v7l)
BogoMIPS	: 57.60
Features	: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x0
CPU part	: 0xc07
CPU revision	: 5

processor	: 1
model name	: ARMv7 Processor rev 5 (v7l)
BogoMIPS	: 57.60
Features	: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x0
CPU part	: 0xc07
CPU revision	: 5

processor	: 2
model name	: ARMv7 Processor rev 5 (v7l)
BogoMIPS	: 57.60
Features	: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x0
CPU part	: 0xc07
CPU revision	: 5

processor	: 3
model name	: ARMv7 Processor rev 5 (v7l)
BogoMIPS	: 57.60
Features	: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x0
CPU part	: 0xc07
CPU revision	: 5

Busspeed
##################################################### BusSpeed 32 Bit V1.1 Thu Feb 5 11:17:24 2015 Reading Speed 4 Byte Words in MBytes/Second Memory Inc32 Inc16 Inc8 Inc4 Inc2 Read KBytes Words Words Words Words Words All 16 290 284 581 984 1044 1185 32 133 106 121 121 225 426 64 84 73 87 93 170 341 128 53 51 48 62 109 249 256 34 37 32 43 86 177 512 31 32 31 42 84 173 1024 31 34 32 45 84 183 4096 32 32 32 43 87 190 16384 32 34 34 41 83 176 65536 31 32 33 44 83 176 End of test Thu Feb 5 11:17:36 2015 SYSTEM INFORMATION From File /proc/cpuinfo processor : 0 model name : ARMv6-compatible processor rev 7 (v6l) BogoMIPS : 2.00 Features : half thumb fastmult vfp edsp java tls CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xb76 CPU revision : 7 Hardware : BCM2708 Revision : 000f Serial : 0000000022401f90	##################################################### BusSpeed 32 Bit V1.1 Tue Feb 10 12:51:46 2015 Reading Speed 4 Byte Words in MBytes/Second Memory Inc32 Inc16 Inc8 Inc4 Inc2 Read KBytes Words Words Words Words Words All 16 511 533 1333 1777 1706 1750 32 1023 984 1163 1422 1638 1706 64 426 409 761 1092 1365 1365 128 372 393 682 1137 1638 1300 256 213 232 426 758 1191 1094 512 148 146 292 546 910 730 1024 78 85 171 335 662 440 4096 68 76 146 305 629 322 16384 67 74 149 290 645 335 65536 69 74 148 296 592 353 End of test Tue Feb 10 12:51:57 2015 SYSTEM INFORMATION From File /proc/cpuinfo processor : 0 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 38.40 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 1 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 38.40 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 2 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 38.40 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 3 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 38.40 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5
Dhrystone
##################################################### Dhrystone Benchmark 2.1 Opt 3 32 Bit, Thu Feb 5 11:13:07 2015 Nanoseconds one Dhrystone run: 675.00 Dhrystones per Second: 1481481 VAX MIPS rating = 843.19 Numeric results were correct #####################################################	##################################################### Dhrystone Benchmark 2.1 Opt 3 32 Bit, Tue Feb 10 12:52:43 2015 Nanoseconds one Dhrystone run: 368.75 Dhrystones per Second: 2711864 VAX MIPS rating = 1543.46 Numeric results were correct ##################################################### SYSTEM INFORMATION From File /proc/cpuinfo processor : 0 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 57.60 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 1 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 57.60 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 2 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 57.60 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 3 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 57.60 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5
Linpack
Livermore Loops
##################################################### Livermore Loops Benchmark Opt 3 32 Bit via C/C++ Thu Feb 5 11:17:50 2015 MFLOPS for 24 loops 64.3 79.3 128.8 145.0 22.9 29.0 106.7 125.8 89.9 37.6 30.8 24.2 21.9 19.2 60.6 58.8 80.6 62.3 73.9 46.6 30.0 22.4 69.0 29.4 Overall Ratings Maximum Average Geomean Harmean Minimum 148.3 64.5 55.0 46.8 19.2 Numeric results were as expected ########################################################	##################################################### Livermore Loops Benchmark Opt 3 32 Bit via C/C++ Tue Feb 10 12:52:47 2015 MFLOPS for 24 loops 113.9 129.1 221.3 203.4 84.5 91.3 195.8 246.4 155.2 136.9 74.2 63.6 62.6 70.2 125.9 125.2 196.3 153.0 132.6 116.2 77.3 41.6 161.2 89.0 Overall Ratings Maximum Average Geomean Harmean Minimum 246.5 125.7 114.7 103.8 41.5 Numeric results were as expected ######################################################## SYSTEM INFORMATION From File /proc/cpuinfo processor : 0 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 57.60 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 1 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 57.60 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 2 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 57.60 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 3 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 57.60 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5
MemSpeed
##################################################### Memory Reading Speed Test 32 Bit Version 4 by Roy Longbottom Start of test Thu Feb 5 11:19:32 2015 Memory x[m]=x[m]+s*y[m] Int+ x[m]=x[m]+y[m] x[m]=y[m] KBytes Dble Sngl Int32 Dble Sngl Int32 Dble Sngl Int32 Used MB/S MB/S MB/S MB/S MB/S MB/S MB/S MB/S MB/S 8 568 602 853 639 731 1094 1122 465 653 16 538 602 787 602 682 1023 1142 533 727 32 301 269 319 292 269 353 984 511 571 64 243 213 238 232 217 255 341 269 301 128 182 167 182 176 165 189 284 243 243 256 142 131 142 136 131 148 146 128 134 512 140 131 142 136 131 148 121 113 119 1024 138 129 140 136 131 146 121 108 113 2048 140 129 140 136 131 146 128 111 119 4096 140 129 142 136 131 146 124 111 116 8192 140 131 140 136 131 146 122 111 117	##################################################### Memory Reading Speed Test 32 Bit Version 4 by Roy Longbottom Start of test Tue Feb 10 12:54:25 2015 Memory x[m]=x[m]+s*y[m] Int+ x[m]=x[m]+y[m] x[m]=y[m] KBytes Dble Sngl Int32 Dble Sngl Int32 Dble Sngl Int32 Used MB/S MB/S MB/S MB/S MB/S MB/S MB/S MB/S MB/S 8 1024 1333 1142 2133 1406 1523 2666 1666 1523 16 1023 1306 1185 2133 1406 1523 2461 1641 1523 32 1023 1185 1094 1777 1333 1333 1939 1454 1422 64 930 1094 1067 1662 1142 1230 1422 1333 1333 128 930 1067 985 1524 1094 1142 1142 1333 1333 256 930 1016 986 1525 1094 1186 1142 1454 1334 512 538 639 568 682 682 639 986 728 728 1024 393 512 393 465 512 445 891 496 537 2048 310 445 320 353 445 341 895 460 496 4096 310 445 310 353 445 330 904 511 465 8192 297 427 307 338 446 338 906 491 491 SYSTEM INFORMATION From File /proc/cpuinfo processor : 0 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 57.60 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 1 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 57.60 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 2 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 57.60 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 3 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 57.60 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5
Whetstone
############################################## Whetstone Single Precision C Benchmark Opt 3 32 Bit, Thu Feb 5 11:12:19 2015 Loop content Result MFLOPS MOPS Seconds N1 floating point -1.12475013732910156 97.087 0.053 N2 floating point -1.12274742126464844 100.053 0.360 N3 if then else 1.00000000000000000 693.450 0.040 N4 fixed point 12.00000000000000000 422.100 0.200 N5 sin,cos etc. 0.49911010265350342 5.822 3.830 N6 floating point 0.99999982118606567 85.035 1.700 N7 assignments 3.00000000000000000 550.293 0.090 N8 exp,sqrt etc. 0.75110864639282227 2.694 3.700 MWIPS 268.726 9.973	############################################## Whetstone Single Precision C Benchmark Opt 3 32 Bit, Tue Feb 10 12:57:53 2015 Loop content Result MFLOPS MOPS Seconds N1 floating point -1.12475013732910156 247.727 0.041 N2 floating point -1.12274742126464844 263.324 0.270 N3 if then else 1.00000000000000000 1368.787 0.040 N4 fixed point 12.00000000000000000 1110.900 0.150 N5 sin,cos etc. 0.49911010265350342 10.259 4.290 N6 floating point 0.99999982118606567 224.679 1.270 N7 assignments 3.00000000000000000 888.720 0.110 N8 exp,sqrt etc. 0.75110864639282227 5.165 3.810 MWIPS 530.007 9.981 SYSTEM INFORMATION From File /proc/cpuinfo processor : 0 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 38.40 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 1 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 38.40 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 2 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 38.40 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5 processor : 3 model name : ARMv7 Processor rev 5 (v7l) BogoMIPS : 38.40 Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 5

I have ommited system information for tests after the first one for the old model, but not for Model 2. The first difference you can find is the four cores in model B, with an A7 architecture. In the original RPi, the cpuinfo declares 2 BogoMIPS, while in the new one each one is displayed with 57.60 BogoMIPS and sometimes less, 38.40. It has to be due to the frequency, that can vary between 600 and 900MHz. Maybe I shoud repeat the tests forcing 900MHz to optimize for performance. That’s why I left system information, so bogomips can be found for each test.
As can be seen, results are much better for the new model (2-3 times faster, depending on the test), and must be taken into account that the code has been compiled for A6 architecture, and that the tests are designed for one core, so the difference has to be due to the frequency, the new architecture and the improved bus and memory speed (3-4 times faster).

Please leave any comment if you have any additional data or interpretation. Further study and analysis of results are needed, of course.

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Benchmarks

Busspeed

Dhrystone

Linpack

Livermore Loops

MemSpeed

Whetstone

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