Re: Arcam rpac, config help

[chris hermansen <clhermansen@xxxxxxxxx>]

Hi Vince and list;

On Sat, Jan 4, 2014 at 2:17 PM, Vince Ur <vince.um@xxxxxxxxx> wrote:

Rutger,

>I don't think that aplay can handle a .flac file directly

you are right I am using alsaplayer now

here's the output:

let's back up a step!

I believe you that the kernel in wheezy is 3.2 but I bet to get the kind of performance you want out of your XMOS usb interface will require something newer!

If you want to test with aplay (and you SHOULD want to test with aplay) you need to convert your flac to a wav file.  You can use the flac command line tools to do that.
 

alsaplayer -d rp Music/208_-_Mio_Nemico.mp3

Unable to install hw params:

That line above is kind of important!
 

ACCESS:  RW_INTERLEAVED

FORMAT:  S16_LE
SUBFORMAT:  STD
SAMPLE_BITS: 16
FRAME_BITS: 32
CHANNELS: 2
RATE: 44100
PERIOD_TIME: (11609 11610)
PERIOD_SIZE: 512
PERIOD_BYTES: 2048
PERIODS: 16
BUFFER_TIME: (185759 185760)
BUFFER_SIZE: 8192
BUFFER_BYTES: 32768
TICK_TIME: 0

Can somebody explain me where the values above are coming from? Is ALSA guessing? Are they coming from my sound card?

It seems to me, that I need to give the right hw  parameteers to ALSA.

here's .asoundrc, I made some little changes

pcm.rp {
        type plug
        slave {
                pcm "hw:1,0"
                channels 2
        }
}

ctl.rp {
        type hw
        card 1
}

Regards,

Vince

2014/1/4 Rutger Noot <rutger.noot@xxxxxxxxxxx>

Dear Vince,

 

Really, you need to stop trying to make a 3.2 kernel work and try something around 3.11 or 3.12.

If you are reluctant to find a newer pre-built kernel and don't want to build one yourself then I suggest you try Ubuntu 13.10 on a USB stick just to see if 3.11 works with your device.

--

Chris Hermansen · clhermansen "at" gmail "dot" com

C'est ma façon de parler.

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