I made a small change in InOut/pa_blocking.c which I have committed in
Csound 5. On my Windows XP Home Edition system using the M-Audio Ozone for
both MIDI input and ASIO audio output, I can perform on the keyboard with
acceptable latency and without the clicks you mentioned. Both channels
work, too, and the stereo image is correct.

There is still a problem with stopping a performance in the middle; that
leaves a hanging Csound process after which real-time audio does not start
properly again. I am working on this.

Later today, whether or not I fix this stop/restart problem, I will upload
a new file release.

This is ASIO-only, but I may also find time to experiment with putting the
other drivers back into the build.

Original Message:
-----------------
From: Art Hunkins abhunkin@uncg.edu
Date: Sun, 12 Sep 2004 13:51:05 -0400
To: csound@lists.bath.ac.uk
Subject: [Csnd] Followup: Realtime Csound5 Windows Audio Test


Michael,

I did further checking that compared the audio output from your *two* last
CS5 Windows versions - using the same test file under the same conditions.

My results were the same for your lastest version as for the previous (ASIO
only) one. All the drivers on both my stereo card and my Echo Gina
(multichannel) showed up as expected; and all performed with the
"two-clicks-per-second" audio output I previously described.

A bit puzzling was that this "click rate" was perhaps a *bit* faster for
some drivers than others - I couldn't find a reason for this. Perhaps
related to this (and perhaps not!), the playtimes for the 30" file also
varied somewhat: from a low of about 12" to a high of about 22". Again, I
couldn't make a pattern of it. Most were right at 17" however.

My personal conclusion is that at least ASIO seems to be (mal-)functioning
the same in the two versions.

I did have a problem establishing, with your most recent version, which of
the driver outputs were MME and which were DirectSound. (The ASIO were
always clearly marked.) For example, my simple stereo card marks its output
devices thus: MS Sound Mapper, Avance Sound - 41K, Primary Sound Driver -
48K, Avance Sound - 48K, and ASIO4ALL - 41K(!). In that order.

Should I assume the first two to be MME, and the second two, DirectSound? (I
was also surprised to find the ASIO4ALL driver marked 41K; it usually shows
up as 48K). Is the 48K a key that the driver is not MME?

Art Hunkins

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