Re: [Alsa-user] [SB Audigy4] capturing problems

Re: [Alsa-user] [SB Audigy4] capturing problems

[Lee Revell]

On Sun, 2005-12-11 at 05:57 +0100, Christian Parpart wrote:
> On Saturday 10 December 2005 21:40, Lee Revell wrote:
> [...]
> > OK.  Just for the sake of future driver improvements, do you know what
> > capabilities is the Audigy4 supposed to have that the Audigy2 does not?
> 
> technical specification (shamelessly stolen from retail box :D):
> * 64 audio channel playback with independent sample rates
> * 24bit digital-to-analog conversion during playback with 
>   sampling rates of 8, 11.025, 16, 22.05, 24, 32, 44.1, 48 and 
>   96kHz in 7.1 mode and up to 192kHz in stereo mode
> * 24bit analog-to-digital conversion during recording in 8, 16, 
>   or 24bit at sampling rates of 8, 11.025, 16, 22.05, 24, 32, 
>   44.1, 48 and 96kHz
> * supports sony/philips digital interface (spdif) format of 
>   up to 24bit/96kHz quality
> * low latency multitrack recording with ASIO 2.0 support
> 
> Now this:
> 
> battousai linux # cat /proc/asound/pcm
> 00-00: emu10k1 : ADC Capture/Standard PCM Playback : playback 32 : capture 1
> 00-01: emu10k1 mic : Mic Capture : capture 1
> 00-02: emu10k1 efx : Multichannel Capture/PT Playback : playback 8 : capture 1
> 00-03: emu10k1 : Multichannel Playback : playback 1
> 00-04: p16v : p16v : playback 1 : capture 1
> 
> ^^ the above shows me a playback of 32 and capture of 1.
> is this correct, I'm asking because the spec tells something about 64 audio 
> channel playback (unfortunately doesn't mention the capture side :(

Hmm, yes, that might be the difference.  It sounds exactly like the
Audigy2 but with 64 substreams rather than 32.  And 64 substreams would
fit nicely into the current driver without requiring a new register
addressing scheme (see emu10k1.h, PTR_CHANNEL_MASK is 0x3f).

I'll send an experimental patch.

Lee

Lee



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