[wdmaudiodev] Re: kernel streaming and midi
- From: "Michael Dillon" <mike@xxxxxxxxxxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Tue, 27 May 2003 13:50:38 -0400
Hi Martin,
What has been happening is this... If i don't have any midi device connected
to my computer and i just open up the midiOut port to send data to the wave
table synth ( 'Microsoft GS Wavetable SW Synth' to be exact) there seems to
be an unreliable amount of latency from when I call midiOutShortMsg or
midiStreamOut and when I hear the sound from the speakers. This can be up to
about 500 ms.
What do you mean by the KMixer?
Thanks
Mike
----- Original Message -----
From: "Martin Puryear" <martinp@xxxxxxxxxxxxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Tuesday, May 27, 2003 1:46 PM
Subject: [wdmaudiodev] Re: kernel streaming and midi
> Hi Mike,
>
> Can you describe the unreliability problems you are seeing with =
> midiOut/midiIn? I don't know of a reason to bypass the existing MIDI =
> APIs - there is no latency(/jitter) bottleneck a la KMixer. =20
>
> Martin Puryear
> Development Manager
> Microsoft Windows Audio/Video Platform
>
> This posting is provided "AS IS" with no warranties, and confers no =
> rights.
> Ce message est fourni en l'=E9tat, sans garantie d'aucune sorte, et ne =
> vous conf=E8re aucun droit. Vous assumez tous les risques li=E9s =E0 son =
> utilisation.
>
> -----Original Message-----
> From: wdmaudiodev-bounce@xxxxxxxxxxxxx =
> [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Michael Dillon
> Sent: Monday, May 26, 2003 12:36 PM
> To: wdmaudiodev@xxxxxxxxxxxxx
> Subject: [wdmaudiodev] kernel streaming and midi
>
> Hi there,
>
> I've been investigating ways to implement audio and midi io on windows =
> (2000 and later) for an application being developed. The application =
> requires very low latency midi and wave output, think Cakewalk, Cubase, =
> Logic, etc. I've tried using the mmsystem api and have found it too =
> unreliable for what I'm trying to do, and I have a feeling that the =
> DirectMusic api will be the same.=20
>
> I found out that Cakewalk uses WDM kernel streaming and I'm hoping that =
> this is also a good implementation method for my application. What I =
> haven't been able to find out is weither it's possible to send midi data =
> via kenel streaming from an application to a midi device.=20
>
> As you've probably gathered, I'm new to all this, so any information =
> would be greatly appreciated.
>
> thanks,
> mike
>
>
>
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