Echo when playing sounds

Hi,

Whenever I play a sound, it keeps echoing which is really annoying.
I experience it on windows and mac too.

Here's an example where it can be clearly heard:

| sound envelope |
sound := PluckedSound new.
envelope := VolumeEnvelope
  points: { 0@1.0. 10@1.0. 20@0.0 }
  loopStart: 2
  loopEnd: 2.
envelope target: sound; scale: 0.3.
sound
  addEnvelope: envelope;
  setPitch: 220 dur: 0.1 loudness: 0.3;
  play

Is it intentional, or is it a bug?


Cheers,
Levente

Try evaluating 'SoundPlayer stopReverb'.

Cheers,
Josh


On Dec 17, 2009, at 9:24 AM, Levente Uzonyi wrote:

On Thu, 17 Dec 2009, Josh Gargus wrote:

> Try evaluating 'SoundPlayer stopReverb'.

It works, thanks. But it's strange that the same code gives no sound. I
have to increase the duration to hear any sound.


Levente

Hello Levente,

LU> It works, thanks. But it's strange that the same code gives no sound. I
LU> have to increase the duration to hear any sound.

there is a preference "soundQuickStart" under media.

Otherwise I put some silence before and after my actual sound.

Is there something special you want to accomplish?


Cheers,

Herbert                            mailto:[hidden email]

On Thu, 17 Dec 2009, Herbert König wrote:

> Hello Levente,
>
> LU> It works, thanks. But it's strange that the same code gives no sound. I
> LU> have to increase the duration to hear any sound.
>
> there is a preference "soundQuickStart" under media.

That didn't make any difference. If the duration is less than ~0.12 the
sound doesn't play.


Levente

On 17.12.2009, at 22:06, Levente Uzonyi wrote:
That sounds like a bug. Which VM are you using?

- Bert -

Well if this is the macintosh VM (unix or carbon 3.x/4.x) then I suspect the playback of the first N milliseconds of sound is not *quite right*.

If possible the test case should be tried on the 5.x Squeak Macintosh VM because I rewrote the sound logic to use Apple's latest
suggested API and took great care to ensure playback was timely and *correct* for the first N milliseconds.


On 2009-12-17, at 2:03 PM, Bert Freudenberg wrote:

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Corporate Smalltalk Consulting Ltd.  http://www.smalltalkconsulting.com
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On Thu, 17 Dec 2009, Bert Freudenberg wrote:
A self built windows vm with the latest VMMaker fixes, but I tried it with
the latest official windows vm (3.11.5) and it's the same.


Levente

> - Bert -
>
>
>
>

On Thu, Dec 17, 2009 at 11:03:32PM +0100, Bert Freudenberg wrote:
I have a very hazy recollection of someone on the vm-dev or etoys
list a few years ago discussing a sound player bug that had something
to do with 0 versus 1 based indexing and missing the zeroeth instance
of some buffer. Does anyone recall such a thing?

Dave