Re: Re: au88x0_synth

[Alien <alien999999999@users.sourceforge.net>]

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while you guys are working on that driver, is there anyone that has a 64bit 
setup? if not, i'd like to test out your driver in 64bit. i still have a 
number of issues with it (my card is an au8810).

i cannot regularly check it, cause i only have one PC and it's a server, but 
at nighttimes, i guess i can test it out a little.

good luck, AL13N

Op woensdag 30 maart 2005 10:04, schreef Raymond:
> Takashi Iwai wrote:
> > Raymond wrote:
> >>>>Lee Revell wrote:
> >>>>Looks like this chipset has a wavetable synth.  And I noticed some
> >>>>references to a driver on the openvortex list.  Would it be possible
> >>>>for ALSA to support it?
> >>>
> >>>Manuel Jander wrote:
> >>> Of course, but there are some unresolved hardware issues. The
> >>> WaveTable helper hardware is very similar to the trident
> >>> Wavetable helper hardware. It does not interpret MIDI directly, but
> >>> at least does some effect processing in hardware.
> >>
> >>http://sourceforge.net/mailarchive/message.php?msg_id=6004190
> >>
> >>1) Is the Trident Wavetable working ?
> >
> > Very limited.  It's no proper "MIDI" wavetable implementation.
> > IIRC, only a module player worked with trident driver.
>
> http://www.alsa-project.org/~frank/alsa-sequencer/node12.html
>
> The midi port only need to support 16 voices, the 16 sample rate
> convertors are just enough to produce 16 voices using the mono sound
> samples in the soundfonts au30gm.arl
>
> http://www.alsa-project.org/alsa-doc/alsa-lib/seq.html
>
> Please correct me if I am wrong, there seem to be no documentation on
> those ALSA sequencer functions such as snd_seq_create_kernel_client,...
>
> What will be needed for a proper "MIDI" wavetable implementation ?
>
> Manuel Jander wrote:
> > Raymond wrote:
> >>The "vortexcontrol" use alsa-lib API to play the audio
> >>samples inside au30gm.arl through hw:0,0.
> >
> > Thats because its just for hearing a sample. Its not even close to
> > what has to be done for a Wavetable implementation. The higher level
> > arl soundbank interpreter is very valuable, but on the hardware side
> > we are missing the WT engine support.
>
> In snd_vortex_playback_hw_adb, .rates = SNDRV_PCM_RATE_CONTINUOUS
>
> 1) Can the sample rate convertor be used to perform pitch shift ?
>
> 2) Can panning be done by changing the mixin-mixout gain for left/right
> channels of each voice ?
>
> The current alsa driver do not even use the timer VORTEX_SMP_TIME or
> timer interrupt VORTEX_SMP_TIMER
>
> 3) Is there any way to find out the resolution of the timer ?
>
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