[LAU] Raspberry PI, internal audio IF + testing new USB IF

[Carlos sanchiavedraz]

Hello again, Ken.

I'm aware of many of the pitfalls you mention, they have caused me one or
two headaches, and I agree with your conclusion. For now it's the only
small device at my disposal to experiment, develop and test and jam without
a laptop/screen.

Regarding the BeagleBone, IIRC, I think Jeremy didn't like quite that much
(I think I red that here in the list or maybe in his blog).

Maybe I think I was delaying going back to an early stage where I had to
investigate and compare platforms/devices (and prices) and to build up
again all that I've achieved at the moment.

Thanks for being so honest, maybe it's a little push for me to change the
platform finally.


2015-03-03 23:35 GMT+01:00 Ken Restivo <ken at restivo.org>:

> After doing several Raspberry Pi projects, I'm very negative on them, and
> will never use them or recommend them again.
>
> The built-in audio is crap, it's not even 16-bit.
>
> The power management and regulation is non-existent and sucks. Raspberry
> Pi's have destroyed a half-dozen SD cards of mine. The people in the Pi
> community just shrug about this. It's unacceptable to me.
>
> USB is a joke on Raspberry's. I wouldn't even try to use a USB device. The
> Raspberry developers solved this problem by doubling the number of USB
> ports on the new B+ units... without fixing any of the problems... so now
> you can have twice the fail.
>
> Ethernet is a joke; it's a USB device. To get the Pi to work reliably,
> I've had to turn off USB2 mode anyway, so the Ethernet is beat-the-dog slow
> too.
>
> There's no databook for the chip, last I checked. Oh sure, there's a PDF
> documenting a few of the features of the I/O ports. There's no actual
> databook, like any good CPU core or SOC would have.
>
> There's no real bootloader. Some call it a feature, I don't. There's no
> built-in flash either (another thing touted as a feature that I consider a
> design limitation).
>
> I don't consider it economical since once you add up all the things you'll
> need to get it to do work, you could buy a better-engineered platform for
> the same price. And the Pi is slower than many of the other platforms in
> its price range.
>
> I'd instead recommend the BeagleBone Black for projects if you want a
> mature, well-documented platform, or any number of the new exciting
> ARM-based platforms coming out if you wanted to venture into something new.
>
> I've done a few projects using the Pi over the past few years, both
> pro-bono and professionally, and I would not recommend the platform to
> anyone.
>
> Sorry, I like to stay positive but my experience with Raspberry's has not
> been good.
>
> Keep looking and you'll probably quickly find something that works.
>
> -ken
> --
> ---------
> On Wed, Feb 25, 2015 at 07:59:57PM +0100, Carlos sanchiavedraz wrote:
> > Hello dear all.
> >
> > I'm testing a small interface for some musical and technological projects
> > which has an instrument input jack on one side and no audio output, just
> > USB on the other side. This IF works great but you have no physical audio
> > output to monitor/hear sound, so I thought I could enable internal audio
> IF
> > (as I've done on other devices) and that will be the audio output instead
> > of needing another second IF to get audio from.
> >
> > So I decided to rescue some past investigations I made when first
> > researching about RPi, along with the great content generated by some
> dear
> > great folks in here, and some new research one after each problem.
> >
> > First started from a Raspbian 2012 version which I had already tweaked
> for
> > a headless autojamming/instrument effects/looper, but got many issues
> > making step by step progresses that I briefly point here FWIW:
> >
> > - Enabled internal IF on Raspbian 2012 [1]
> >
> > - Found mmap problem regarding using Jackd with internal IF [2], even
> tried
> > a module somebody compiled
> >
> > - Tried switching to the new platform version, Raspbian 2015 (raspberrypi
> > 3.2.27+) but there wasn't even /proc/asound
> >
> > - Couldn't get to load snd-bcm2835 kernel module for internal soundcard
> [4]
> >
> > - Finally I got an error from the very raspi-config regarding internal
> > audio IF [5]
> >
> > Although I continue researching, I guess somebody here has already gone
> > through some of this, but I'm wondering if it's already an abandoned
> thing
> > by the makers themselves this thing of the internal IF thing.
> >
> > Thanks as always.
> > Greetings all.
> >
> > +info:
> >
> > [1] enable internal souncard on Raspbian 2012
> >
> https://duckduckgo.com/?q=%22raspberry+pi%22+enable+internal+soundcard&t=debian
> > http://www.raspberrypi.org/forums/viewtopic.php?f=66&t=18573
> >
> http://stackoverflow.com/questions/12144972/jack-audio-connection-kit-jackd-daemon-fails-to-start-on-raspberrypi
> >
> > [2] enable mmap to run jack with internal soundcard on Raspbian 2012
> >
> https://martinezjavier.wordpress.com/2013/04/27/mmap-support-for-raspberry-pi-bcm2835-alsa-driver/
> > https://www.hifiberry.com/forums/topic/jackd/
> >
> > [3] cat: /proc/asound: No such file or directory
> >
> https://duckduckgo.com/?q=%22cat%3A+%2Fproc%2Fasound%3A+No+such+file+or+directory%22&t=debian
> > http://forums.debian.net/viewtopic.php?t=74914
> > http://forum.ubuntu.ru/index.php?topic=99987.105
> > http://forums.debian.net/viewtopic.php?p=415341
> >
> > [4] error when loading snd-bcm2835 kernel raspberrypi 3.2.27+ module for
> > internal soundcard on Raspbian 2015
> >
> https://duckduckgo.com/?q=%22libkmod%3A+ERROR+..%2Flibkmod%2Flibkmod.c%3A554+kmod_search_moddep%3A+could+not+open+moddep+file+%27%2Flib%2Fmodules%2F3.2.27%2B%2Fmodules.dep.bin%27%22&t=debian
> > http://www.raspberrypi.org/forums/viewtopic.php?f=44&t=36445&p=305808
> >
> > [5] error raspi-config when enabling audio via minijack on Raspbian 2015
> >
> https://duckduckgo.com/?q=raspberry+pi+%22there+was+an+error+running+option+A9+audio%22&t=debian
> > http://www.hifiwigwam.com/showthread.php?115856-Raspberry-Pi-2/page3
> >
> > --
> >
> > C. sanchiavedraZ:
> > * NEW / NUEVO:     www.sanchiavedraZ.com
> > * Musix GNU+Linux: www.musix.es
>
> > _______________________________________________
> > Linux-audio-user mailing list
> > Linux-audio-user at lists.linuxaudio.org
> > http://lists.linuxaudio.org/listinfo/linux-audio-user
>
>


-- 

C. sanchiavedraZ:
* NEW / NUEVO:     www.sanchiavedraZ.com
* Musix GNU+Linux: www.musix.es
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