Re: [Alsa-user] aplay rate - what is it for ?

On Fri, Oct 9, 2015 at 11:52 AM, Clemens Ladisch wrote: > Ran Shalit wrote: >> I don't understand why rate is required when we play PCM file. > > The rate is _not_ required when we play PCM file. > > If the file header has the rate, aplay ignores the rate parameter. &g

Re: [Alsa-user] aplay rate - what is it for ?

On Thu, Oct 8, 2015 at 7:55 PM, chris hermansen wrote: > Ran and list, > > On Oct 8, 2015 09:29, "Ran Shalit" wrote: >> >> Hello, >> >> I don't understand why rate is required when we play PCM file. >> The sample rate is already encoded in

[Alsa-user] aplay rate - what is it for ?

Hello, I don't understand why rate is required when we play PCM file. The sample rate is already encoded in file header, so why would aplay need this parameter ? Thanks, Ran -- ___

Re: [Alsa-user] arecord sample rate

On Sat, Sep 19, 2015 at 11:20 AM, Ran Shalit wrote: > Hello, > > I'm using arecord as following: > arecord --device=plughw:0,0 --duration=2 test.wav > Anit is prints that it is using rate: 8000Hz > But on opening it with audacity, or vlc, it shows that sample rate is

[Alsa-user] arecord sample rate

Hello, I'm using arecord as following: arecord --device=plughw:0,0 --duration=2 test.wav Anit is prints that it is using rate: 8000Hz But on opening it with audacity, or vlc, it shows that sample rate is 44100. Is there any explaination for this behaviour ? Regards, Ran

[Alsa-user] arecord - playback speed is faster then in reality

Hello, I use arecord to record as done in the following line: arecord --device=plughw:0,1 --duration=8 /mnt/nfs/test.wav But on playing the recorded file (vlc or audacity) it is played faster then the real speed: https://drive.google.com/file/d/0B22GsWueReZTUnFvYXZRNjBiZXM/view?usp=sharing What

[Alsa-user] aplay/arecord hang

Hello, I am using 2 cards for sound. I have configured the crads/hw in kernel for the custom board. With card0 , arecord seems OK (not yet checked the result record wav file), but with card1 it hangs in (strace output): poll([{fd=4, events=POLLIN|POLLERR|POLLNVAL}], 1, -1 Does anyone have any idea

Re: [Alsa-user] 'control ... is already present' message

On Fri, Sep 11, 2015 at 9:42 AM, Clemens Ladisch wrote: > Ran Shalit wrote: >> asoc: failed to add dapm kcontrol Right HPCOM Mixer Line2L Bypass Switch: -16 >> asoc: failed to add kcontrol Right Line2R Mux >> ... >> What is the reason for the "asoc: fail

[Alsa-user] 'control ... is already present' message

Hello, I'm using 2 codecs (tlv320aic3x-codec) each which both are registered into same sound card, each as a single device. After boot I have the following devices: root@dm814x:~# cat /proc/asound/devices 0: [ 0] : control 16: [ 0- 0]: digital audio playback 17: [ 0- 1]: digital audio play

Re: [Alsa-user] compile test examples

On Wed, Jul 15, 2015 at 12:50 PM, Ran Shalit wrote: > Hello, > > I cross-compile alsa-project for arm target. > It seems to work find. > I then wanted to compile test examples: > make pcm > CC pcm.o > CCLD pcm > But It seems to create just object .o, not

Re: [Alsa-user] dual mono

> > > > "Dual mono" is indeed an AAC-related concept. > > When you record multiple channels using ALSA, they are always independent, > i.e., ALSA does not make any assumptions about the sample values in the > channels (or, for that matter, about consecutive samples in the same > channel). In other

[Alsa-user] compile test examples

Hello, I cross-compile alsa-project for arm target. It seems to work find. I then wanted to compile test examples: make pcm CC pcm.o CCLD pcm But It seems to create just object .o, not executable I see that there is additional pcm script file in the test folder. Does anyone know

[Alsa-user] dual mono

Hello, I am new with ALSA project. I would like to ask if dual mono, is used in ALSA APIs, or wether it is the same as stereo. Thank you, Ran -- Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions pr