Winamp 2 Kernel Streaming Output Plugin, Wanna try out my KS output plugin for WA Options

[Chun-Yu]

I just wrote a simple Kernel Streaming output plugin for WA2 - check it out at http://www.cs.indiana.edu/~cshei/out_ks.dll. It's very experimental right now - it just uses the first output device it finds, and it's currently hard-coded to use 10 output buffers (so it might skip if you have all those WinXP visual effects enabled). Source code is at http://www.cs.indiana.edu/~cshei/out_ks.zip (a VC++ .NET project - sorry VC++ 6 users). I just wrote it this afternoon, because Microsoft released a Kernel Streaming demo today . I'll be adding tons of stuff soon, including SSRC resampling (for those who are blessed with fixed sampling rate DACs ) and selection of output device and # of buffers.

Annuka: using Kernel Streaming should prevent ALL other programs from using the sound device, which should solve the "Silence Flash" problem.

Edit: By the way, if you do give it a try, give me some comments/suggestions

This post has been edited by Chun-Yu: Nov 29 2002, 01:54

[Chun-Yu]

On my system, currently using only a Realtek AC97 spdif out, the sample rate is being converted from 44.1 to 48 kHz as per normal kmixer experience. Shouldn't Kernel Streaming enable direct 44.1 digital output?

No, if your audio driver only outputs at 48 kHz (probably because your DAC only supports a fixed rate of 48 kHz). I'm guessing that since the DAC is fixed at 48 kHz, so is the digital out (like the SB Live!?). In this case, the sampling rate conversion isn't done by KMixer, but by the audio driver, which cannot be bypassed. All I can suggest is...getting a new soundcard?

[va3atc]

On my system, currently using only a Realtek AC97 spdif out, the sample rate is being converted from 44.1 to 48 kHz as per normal kmixer experience. Shouldn't Kernel Streaming enable direct 44.1 digital output?

No, if your audio driver only outputs at 48 kHz (probably because your DAC only supports a fixed rate of 48 kHz). I'm guessing that since the DAC is fixed at 48 kHz, so is the digital out (like the SB Live!?). In this case, the sampling rate conversion isn't done by KMixer, but by the audio driver, which cannot be bypassed. All I can suggest is...getting a new soundcard? ;)

I have the exact same problem under Windows 2000.

I used the NVIDIA linux drivers for Realtek ALC650 (same as yours or darn close) nForce2 in Redhat 8.0 and played the 44.1khz DTS stream bit-perfect
cat my-dts-audio.wav > /dev/dsp

Though I've tried both ASIO and Kernel streaming in Win2k and it STILL upsamples to 48khz.