[LAU] Raspberry PI, internal audio IF + testing new USB IF
csanchezgs at gmail.com
Wed Mar 4 13:37:18 UTC 2015
Jeremy, I think you're using Cubieboard2 lately. Have you tried Odroid?
I've just replied another thread where it was mentioned an it seems a
really good alternative (for at least its connectivity) in conjunction with
an external audio IF.
2015-03-04 14:22 GMT+01:00 Jeremy Jongepier <jeremy at autostatic.com>:
> On 03/03/2015 11:35 PM, Ken Restivo wrote:
> > 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.
> True, it's 11-bit PWM so also not your standard DAC ;)
> > 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.
> Bought my first RPi in the Fall of 2012 and that one, including all the
> ones that came after it, have not eaten any SD card in my case. Had my
> share of corrupted filesystems though but no faulty SD's.
> > 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.
> The implementation is not that good but I can live with it.
> > 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
> If you disable Turbo mode for the ethernet interface network is a wee
> bit slower but USB performance is better.
> > 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.
> That's surely a major drawback.
> > 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 call it a feature, takes away the complexity of picky bootloaders like
> uBoot. Flash memory is nice but apart from not having to buy a SD card
> for a couple of bucks I don't really see the advantage of it. On my
> Cubieboard2 I don't get any noticable performance gain when running the
> OS from flash.
> > 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.
> The community is huge, I'd call that a valuable economical asset. But
> then I have no notion of how big the other communities are at the moment.
> > 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
> The RPi is just not made for professional use. If you need an ARM
> development board for professional use I'd recommend a Beagleboard,
> Cubieboard, Odroid or any other board that doesn't have the
> aformentioned issues with the onboard audio, USB, ethernet,
> documentation etc. But then in my experience most of these alternatives
> are more expensive than a RPi.
> > Sorry, I like to stay positive but my experience with Raspberry's has
> not been good.
> I like 'm but I can imagine people really having issues with them. I
> jumped the bandwagon not expecting much of it. So far the RPi exceeds my
> expectations for a $35 computing device.
> > 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
> >> 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
> >> 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
> >> 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
> >> great folks in here, and some new research one after each problem.
> >> First started from a Raspbian 2012 version which I had already tweaked
> >> 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 
> >> - Found mmap problem regarding using Jackd with internal IF , even
> >> a module somebody compiled
> >> - Tried switching to the new platform version, Raspbian 2015
> >> 3.2.27+) but there wasn't even /proc/asound
> >> - Couldn't get to load snd-bcm2835 kernel module for internal soundcard
> >> - Finally I got an error from the very raspi-config regarding internal
> >> audio IF 
> >> 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
> >> by the makers themselves this thing of the internal IF thing.
> >> Thanks as always.
> >> Greetings all.
> >> +info:
> >>  enable internal souncard on Raspbian 2012
> >> http://www.raspberrypi.org/forums/viewtopic.php?f=66&t=18573
> >>  enable mmap to run jack with internal soundcard on Raspbian 2012
> >> https://www.hifiberry.com/forums/topic/jackd/
> >>  cat: /proc/asound: No such file or directory
> >> 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
> >>  error when loading snd-bcm2835 kernel raspberrypi 3.2.27+ module for
> >> internal soundcard on Raspbian 2015
> >> http://www.raspberrypi.org/forums/viewtopic.php?f=44&t=36445&p=305808
> >>  error raspi-config when enabling audio via minijack on Raspbian 2015
> >> 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
> > _______________________________________________
> > Linux-audio-user mailing list
> > Linux-audio-user at lists.linuxaudio.org
> > http://lists.linuxaudio.org/listinfo/linux-audio-user
> Linux-audio-user mailing list
> Linux-audio-user at lists.linuxaudio.org
* NEW / NUEVO: www.sanchiavedraZ.com
* Musix GNU+Linux: www.musix.es
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Linux-audio-user