[Alsa-user] A problem about an audio device with HID interface

I have a USB audio device, C-media, that is applying USB audio class v1.0. This audio device has an interrupt endpoint within the USB HID interface. This interrupt endpoint is used to get status from the audio device, and the status is about mixer. In some audio device, the interrupt endpoint is

Re: [Alsa-user] more on snd-pcsp

Hi, firstly my apologies for the multiple messages to alsa-user. The mailing list hosting on sourceforge was having problems at the time. stan wrote, on 2008-06-10 07:38: > Arthur Marsh wrote: >> Hi, I finally installed a Debian snapshot kernel that uses ALSA 1.0.16 >> rather than a 1.0.16 relea

Re: [Alsa-user] Unmolested audio

Bill Unruh wrote: > I definitely agree that you want to avoid this . You might look at the > tests I did with the SOX rate conversion routines. Note that if you are > willing to take a long time, that rate conversion can be good. But it takes > a lot of processing and time-- doing a good job in rea

Re: [Alsa-user] A problem about an audio device with HID interface

Rong-Jhe wrote: > I have a USB audio device, C-media, that is applying USB audio class v1.0. > This audio device has an interrupt endpoint within the USB HID interface. > This interrupt endpoint is used to get status from the audio device, and the > status is about mixer. > > In some audio device,

Re: [Alsa-user] Unmolested audio

>> I'm kind of an audiophile and I'd like to make sure there is no >> digital alteration being made to my music between the time it is >> decoded from FLAC and passed to the DAC via USB. We could argue about >> whether it makes a difference, but I'd just like to make sure there is >> a straight "p

[Alsa-user] snd-dummy 2nd card

need to setup 2nd dummy card how to do it? - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php_

Re: [Alsa-user] Output latency

> If I understand your question correctly, it is because they use two > different buffers. If you aren't trying to play the capture buffer, it > would wreak havoc to try to use it for playback while capture is going > on. So there is a buffer for capture and a buffer for playback. And > each

Re: [Alsa-user] Output latency

Alex, > The idea is the following : > > 1.) Of course there has to be an input double buffer which generates > the desired block of samples. You want hardware monitoring - there are sound cards that support hardware mixing. With good converters you have latencies down to 5 samples at 192kHz, t

Re: [Alsa-user] Output latency

Hej, thanks for getting back to me. > What do you want to do? Realtime monitoring/mixing? As subject of my PhD research I am working on realtime network music performances. In other words : I am bassplayer and I play livemusic via the Internet with people in different locations. http://www

Re: [Alsa-user] Unmolested audio

Grant wrote: [snip] > Thank you for that. It sounds like whether or not these digital > conversions take place is dependent on the capabilities of the sound > card or DAC. > > That and the audio you are playing. If they match, no alsa conversion. >> I'm not sure about puleaudio, but I think,

Re: [Alsa-user] snd-dummy 2nd card

alexander merkulov wrote: > need to setup 2nd dummy card > how to do it? I'm not sure I understand your question, and I'm not sure I can help, but here is a rephrase to try to understand. Do you mean that you want to create a new alias for your sound card? Like what you get if you run command

Re: [Alsa-user] Output latency

Florian Faber wrote: > Alex, > > >> The idea is the following : >> >> 1.) Of course there has to be an input double buffer which generates >> the desired block of samples. >> > > You want hardware monitoring - there are sound cards that support > hardware mixing. With good converters you

Re: [Alsa-user] Output latency

> I think you would have to customize the driver to do this. In the > special case that you are playing back the recorded input, you write the > input buffer directly to the output buffer every time the input buffer > interrupts because it is time to empty it. Adds an extra branch in the > dr

Re: [Alsa-user] Unmolested audio

>> Thank you for that. It sounds like whether or not these digital >> conversions take place is dependent on the capabilities of the sound >> card or DAC. >> >> > > That and the audio you are playing. If they match, no alsa conversion. >>> >>> I'm not sure about puleaudio, but I think, like jack,

Re: [Alsa-user] Unmolested audio

>> Thank you for that. It sounds like whether or not these digital >> conversions take place is dependent on the capabilities of the sound >> card or DAC. >> >> > > That and the audio you are playing. If they match, no alsa conversion. >>> >>> I'm not sure about puleaudio, but I think, like jack,

Re: [Alsa-user] Output latency

Alexander Carôt wrote: >> If I understand your question correctly, it is because they use two >> different buffers. If you aren't trying to play the capture buffer, it >> would wreak havoc to try to use it for playback while capture is going >> on. So there is a buffer for capture and a buffer

Re: [Alsa-user] Unmolested audio

Grant wrote: > Is running jack, pulseaudio, or esound enough to jeopordize the bits, > or must the audio player support the sound server in order for that to > happen? > > - Grant > > I think you're asking, if the sound server isn't used by the audio player, will it affect the sound quality?

Re: [Alsa-user] Unmolested audio

>> Is running jack, pulseaudio, or esound enough to jeopordize the bits, >> or must the audio player support the sound server in order for that to >> happen? >> >> - Grant >> >> > > I think you're asking, if the sound server isn't used by the audio player, > will it affect the sound quality? No, i

Re: [Alsa-user] snd-dummy 2nd card

no i need independed second card i can setup alias, i can setup dummy as sound card 2, or 3 but what i need is have more then 1 independed dummy card. so i can setup 2 skype for different users on box, on different dummy sound. 2008/6/10 stan <[EMAIL PROTECTED]>: > alexander merkulov wrote: > >>

Re: [Alsa-user] snd-dummy 2nd card

enother word: i need cat /proc/asound/cards show more then 1 sound device 2008/6/10 alexander merkulov <[EMAIL PROTECTED]>: > no i need independed second card > i can setup alias, i can setup dummy as sound card 2, or 3 > but what i need is have more then 1 independed dummy card. > so i can set

Re: [Alsa-user] snd-dummy 2nd card

alexander merkulov wrote: > enother word: > i need > cat /proc/asound/cards > show more then 1 sound device > > > 2008/6/10 alexander merkulov <[EMAIL PROTECTED] > >: > > no i need independed second card > i can setup alias, i can setup dummy as sound card 2, o

Re: [Alsa-user] snd-dummy 2nd card

no. i think u not understand what i need. once again. i need independed streams. i have no sound card. card count=0 now BUT alsa package have dummy sound card it inserted into kernel as snd-dummy. so after i insert it into kernel i have cardcoutn=1 my qwestion is: how i can insert enother and/or g

Re: [Alsa-user] snd-dummy 2nd card

alexander merkulov wrote: > > no. i think u not understand what i need. > once again. > i need independed streams. > i have no sound card. card count=0 now > BUT alsa package have dummy sound card > it inserted into kernel as snd-dummy. so after i insert it into kernel > i have cardcoutn=1 > my qw

Re: [Alsa-user] snd-dummy 2nd card

On 10-06-08 16:47, alexander merkulov wrote: > need to setup 2nd dummy card > how to do it? modprobe snd-dummy enable=1,1 Rene. - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services fo

Re: [Alsa-user] snd-dummy 2nd card

senks. it is it. actualy i already triied index, not triied enable works)) [EMAIL PROTECTED] ~]# modprobe snd-dummy -r;modprobe snd-dummy enable=1,1 index=2,3;cat /proc/asound/cards 2 [Dummy ]: Dummy - Dummy Dummy 1 3 [Dummy_1]: Dummy - Dummy