[PD] Raspberry Pi : DSP on the GPU ? (WAS : Message from the boss of Raspberry Pi Foundation !)

Sat Feb 9 17:52:20 CET 2013

hi,

the only realtime audio tool which use GPU I knew is the one from
LiquidSonic
http://www.liquidsonics.com
it uses CUDA to compute reverb with convolution

This is the only application I found when I was interested in 3 years ago
for my master thesis
but it was the very first steps of CUDA, maybe more audio applications are
available now, but I didn't heart
and this tool works with a NVIDIA Geforce 8, far from RPi's GPU...

cheers

a

--
do it yourself
http://antoine.villeret.free.fr

2013/2/9 chris clepper <cgclepper at gmail.com>

> GPUs are not made for very low latency processing of tiny chunks of data.
>  Trying to run the GPU at 5k to 100k FPS on 256 bytes of data is not going
> to work well at all.  Processing a few seconds of audio at once would show
> massive gains though.
>
> Just ask yourself - how many professional DAWs use the GPU to process
> their audio?  Even the one sold by the company with full access to every
> part of the GPUs they put in their own computers?
>
> Also, I don't get the obsession with the Pi.  There are now lots and lots
> of under $100 ARMv7 dual core (!) boards that run Linux and have way more
> I/O options.  Why not get something not totally out of date to begin with?
>
>
> On Sat, Feb 9, 2013 at 7:51 AM, Pierre Massat <pimassat at gmail.com> wrote:
>
>> Hi again Katja,
>>
>> I just read through it. Couldn't find anything about having the GPU
>> process some audio. It's really mostly about why it's a bad (or good) thing
>> to keep the GPU closed-source (at least that's what I understand [?]).
>>
>> So I guess there isn't must we can do on our own to access the GPU. But
>> then, what can Eben and his team do about it ? I'd like to know what answer
>> we can give him. If he says "just waiting for an application like this" I
>> am assuming that it must have aroused his interest somehow. And I believe
>> that it would be great if people in the Pd community got involved. All I
>> can provide is some testing, but others could contribute more (if i'm not
>> mistaken, Miller Puckette did a great job fixing the analog out for
>> instance). I think we should try and play a part in the development of the
>> Pi. And if we're lucky we'll finally have that Pd box people have been
>> dreaming about for years.
>>
>> Cheers,
>>
>> Pierre.
>>
>> 2013/2/9 katja <katjavetter at gmail.com>
>>
>>> Hi Pierre,
>>>
>>> There has been intensive discussion about GPU processing on RPI:
>>>
>>> http://www.raspberrypi.org/phpBB3/viewtopic.php?f=33&t=6188
>>>
>>> Did you read it? In the light of this discussion, I wonder what Eben
>>> means when writing "We have a bunch of GPU compute available on the device
>>> just waiting for an application like this."
>>>
>>> Anyway it's great they have put your project on RPi blog. You will be
>>> famous, Pi Massat! Congrats again.
>>>
>>> Katja
>>>
>>>
>>>
>>> On Fri, Feb 8, 2013 at 10:51 AM, Pierre Massat <pimassat at gmail.com>wrote:
>>>
>>>> Dear all,
>>>>
>>>> Please read below the message I received from Eben Upton, the boss of
>>>> Raspberry Pi foundation.
>>>> It looks like he was impressed by the video I made, and he says that
>>>> there's a possibility of letting the GPU do some DSP computation.
>>>> I guess you'll all agree that this is awesome news.
>>>>
>>>> I have no idea how we can proceed now. I think i'm absolutely incapable
>>>> of doing anything useful in this field, so i told him that i would transfer
>>>> this message to you, hoping that Miller, HC, Katja (and others) would know
>>>> what needs to be done. We should probably ask him if you guys could work
>>>> directly with their developers.
>>>>
>>>> Let me know what you think.
>>>>
>>>> Cheers!
>>>>
>>>> Pierre.
>>>>
>>>> ---------- Forwarded message ----------
>>>> From: Eben Upton <eben at raspberrypi.org>
>>>> Date: 2013/2/8
>>>> Subject: Re: RPi as multi-effects for guitar
>>>> To: Pierre Massat <pimassat at gmail.com>
>>>>
>>>>
>>>> Hi Pierre
>>>> Awesome stuff - I think Liz is preparing a blog post about this as we
>>>> speak. I'd be very interested in knowing a bit more about the DSP code
>>>> that runs this stuff. We have a bunch of GPU compute available on the
>>>> device just waiting for an application like this.
>>>>
>>>> Cheers
>>>> Eben
>>>>
>>>> On Thu, Feb 7, 2013 at 2:29 AM, Pierre Massat <pimassat at gmail.com>
>>>> wrote:
>>>> > Hi,
>>>> >
>>>> > I write a blog about how to make guitar effects with computers
>>>> running Pure
>>>> > Data in real-time.
>>>> > When I first heard about the Raspberry Pi I thought it would be great
>>>> if I
>>>> > could use it for the same purpose. It would only be much cheaper, and
>>>> much
>>>> > smaller than my current laptop, and could fit in my hand-made
>>>> stompbox.
>>>> > Recent improvements in Raspbian have finally made this possible, and
>>>> this
>>>> > makes me very happy !
>>>> > The Raspberry Pi is now actually capable of running rather demanding
>>>> Pure
>>>> > Data patches in (quasi-) real-time (at least with a latency that's low
>>>> > enough to play live with it).
>>>> > I quickly assembled a small patch to test it and make a video to
>>>> demonstrate
>>>> > that it actually works very well.
>>>> >
>>>> > It is obviously not the use the RPi was originally intended for, but
>>>> to me
>>>> > (and I'm sure to other musicians as well), this sounds like a
>>>> revolution.
>>>> >
>>>> > I'm currently documenting my setup on my blog :
>>>> > - video :
>>>> >
>>>> http://guitarextended.wordpress.com/2013/01/27/real-time-guitar-effects-with-raspberry-pi-pd-and-arduino/
>>>> > - blog post about hardware :
>>>> >
>>>> http://guitarextended.wordpress.com/2013/01/31/raspberry-pi-multi-effects-overview-of-the-setup/
>>>> >
>>>> > There's no trick, the Pi really IS doing all the DSP work. A reader
>>>> posted a
>>>> > comment to ask where the computer was :)
>>>> >
>>>> > I take this opportunity to thank the RPi foundation for all the good
>>>> work
>>>> > you put in this amazing tiny thing. I see that the cam should be out
>>>> in a
>>>> > few months, this is all very exciting. I'm sure the Pi has already
>>>> changed
>>>> > the life of a lot of people !
>>>> >
>>>> > Cheers,
>>>> >
>>>> > Pierre.
>>>> >
>>>> >
>>>> >
>>>>
>>>>
>>>> _______________________________________________
>>>> Pd-list at iem.at mailing list
>>>> UNSUBSCRIBE and account-management ->
>>>> http://lists.puredata.info/listinfo/pd-list
>>>>
>>>>
>>>
>>
>> _______________________________________________
>> Pd-list at iem.at mailing list
>> UNSUBSCRIBE and account-management ->
>> http://lists.puredata.info/listinfo/pd-list
>>
>>
>
> _______________________________________________
> Pd-list at iem.at mailing list
> UNSUBSCRIBE and account-management ->
> http://lists.puredata.info/listinfo/pd-list
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.puredata.info/pipermail/pd-list/attachments/20130209/66bc6912/attachment.htm>