Pi met DSP

[ds23man]

http://www.diyaudio.com/forums/digital- ... ry-pi.html

http://www.crazy-audio.com/

[Henkjan]

dat wordt een µltraZoom

[Chris_T]

Hey, dat ziet er interessant uit! Lang leve RaspberryPI

[hannesie]

Hier heeft hij ook nog wat gepost.

http://www.diy-hifi-forum.eu/forum/show ... 9a6&t=7347

[ds23man]

Hier heeft hij ook nog wat gepost.

http://www.diy-hifi-forum.eu/forum/show ... 9a6&t=7347

Dat is de DAC.

[hannesie]

Hier heeft hij ook nog wat gepost.

http://www.diy-hifi-forum.eu/forum/show ... 9a6&t=7347

Dat is de DAC.

Ze willen niet allemaal zooomen.

En er staat wel meer in van wat hij aan het doen is.
https://www.facebook.com/crazyaudioprojects

Ik kende de site al wel, en dan inderdaad meer voor de DAC, zeker een nette oplossing, maar ik heb nog geen prijs gezien.

[crazy-audio]

Hi,

sorry for not speaking dutch. I saw this discussion and just wanted to give some short informations to you.
The DAC ("HiFiBerry Mini") will be available in about 4 weeks, pricing will be fixed after the final prototype has been tested (in about 3 weeks).

The DSP project is still in an early stage. The hardware is working and the basic communication with the Raspberry Pi is also ok.But there is still a lot to do. If somebody is willing to help with the programming, contact me. The software will be open source.

Daniel

http://www.crazy-audio.com

[Henkjan]

Hi Daniel, welcome here and thanks for taking the effort of posting here personally. Great project.

[hannesie]

Hi Daniel, welcome here and thanks for taking the effort of posting here personally. Great project.

+1

[democles]

Ik weet niet wat dit is...

Ik denk ,,collectief bewustzijn,,...........

Zat toevallig[geloof ik nu niet meer in ] dit hele verhaal ook te lezen op het net.

Wordt het dan eindelijk eens wat met die PI,ben benieuwd

Ondertussen doet mijn sqeeze B het nog...... maar de tijd tikt verder

Nu alleen nog een SPDIF out op de RPI..............

[ds23man]

Is ie ook mee bezig:

http://www.crazy-audio.com/projects/hifiberry-digi/

[b_force]

Ik snap niet helemaal het idee waarom je een AUDAU1701 gaat aansturen met een Raspberry Pi
Deze DSP-chip kun je namelijk standalone aansturen (evt via een microcontroller).
Vind het eigenlijk daarom nogal heel erg omslachtig.

Doe dan het DSP gedeelte OP een Raspberry Pi (rekenpower in overvloed) en sluit er een goede DAC op aan.

Or in English,
Very nice project indeed!
I was wondering why you don't use a DSP on the Raspberry Pi.
You have plenty of processing power on the PI, which is wasted now.
Maybe a better (and more clever) idea is to develop DSP software for the PI and connect a ADC and DAC to the PI.
(I believe it can handle I2C and so on)
PCM4104 and PCM4202 are very nice and easy to use

Besides, the ADAU1701 can be used as standalone device in combination with an uController or with Sigma Studio.

I'm planning to make something like that.
Hardware is no big deal, but programming is not my cup of tea. (I prefer the PCDuino or beaglebone black over the PI)
(I already made a 65x65mm four layer DSP controller prototype, including ADC/DAC)

[crazy-audio]

Hi, the DSP should also work standalone, without the Raspberry Pi. Therefore I use an additional DSP chip. The Raspberry Pi might be able to do some DSP processing, but I'm not sure about the performance. To really test this, it would need some ARM assembly coding, that I do not want to do now.
I try to build a software that is flexible enough to work (at least partially) with other DSPs. Therefore there is a slight chance of a software-DSP in a later stage.

[hsmeets]

Hi,

sorry for not speaking dutch. I saw this discussion and just wanted to give some short informations to you.
The DAC ("HiFiBerry Mini") will be available in about 4 weeks, pricing will be fixed after the final prototype has been tested (in about 3 weeks).

The DSP project is still in an early stage. The hardware is working and the basic communication with the Raspberry Pi is also ok.But there is still a lot to do. If somebody is willing to help with the programming, contact me. The software will be open source.

Daniel

http://www.crazy-audio.com

Hi Daniel,

as you are probably aware of: the squeezebox community (http://www.communitysqueeze.org/) is developing a squeezebox replacement based on a Wandboard (ARM) with supporting hard- and software.

What you are and have created is very similar to what they are doing and your approach is probably even smarter by using the cheaper and ubiquitous RPi. I wonder, you have two addon boards in developement, the DAC board and the SP/DIF-Toslink board: what was/is the reason for not combining them into 1 board? I understand that for a general use-case perspective they often are mutual exclusive: the user uses his own DAC and does not care for your DAC or vice-versa. However in my case and probably others too I would also welcome a combined board.

mit freundliche Grüßen

Huib

[crazy-audio]

The DAC and the TOSLink board use two completely different chip sets. Combining them on a single board would not only make this board quite big, but also expensive. Costs of a combined board would not be lower than the sum of both boards.

[crazy-audio]

Another info about the Squeezebox. Check out this project:
https://sites.google.com/site/picoreplayer/home

It will also support HiFiBerry soon

[hsmeets]

Another info about the Squeezebox. Check out this project:
https://sites.google.com/site/picoreplayer/home

It will also support HiFiBerry soon

Thanks for the heads up! Will keep an eye on that.

[crazy-audio]

I was wondering why you don't use a DSP on the Raspberry Pi.

I had a look at this. It might be ok for simple tasks, but the floating point processing power is quite limited:
http://www.crazy-audio.com/2013/11/usin ... -as-a-dsp/

[b_force]

I was wondering why you don't use a DSP on the Raspberry Pi.

I had a look at this. It might be ok for simple tasks, but the floating point processing power is quite limited:
http://www.crazy-audio.com/2013/11/usin ... -as-a-dsp/

That's true.

For what I understand, is that you can use another OS to improve a lot.
(highly optimised, like you said)

I thought that the Beaglebone or/and PCDuino are a little bit more optimised for those tasks?
The Cortex-A8 is better for those tasks.

My complements that you figured out the possibilities!

[hannesie]

Het Dacje is inmiddels verkrijgbaar.
http://www.hifiberry.com/

[ds23man]

Pre order Hans!

Staat niet bij wanneer je hem krijgt!

Op zich geen geld trouwens.

[hannesie]

Gezien de activiteiten bij Picoplayer e.d. geloof ik wel dat het gaat komen.

De hardware word al wel ondersteund door Koala en andere freaken op het Raspberry forum.

http://www.raspberrypi.org/phpBB3/viewt ... 46#p457646

En dat andere Dac je wat ik heb, zou ook al wel eens ondersteund kunnen worden, gezien die ook al werkt voor de ESS 9018.