[squeak-dev] Mac midi sound weirdness - it gets louder for first few notes.

Bert Freudenberg bert at freudenbergs.de
Thu Nov 6 10:00:44 UTC 2014

On 06.11.2014, at 02:22, tim Rowledge <tim at rowledge.org> wrote:

> Dear Abby,
> I’ve been dealing with some ‘fun’ Pi scratch sound related issues and a weird one has come up on the Mac. Oddly enough the problem was reported on the Pi but I can’t replicate it and whilst trying to work out what on earth is happening I discovered the Mac issue.
> When a scratch script has a loop that looks like this
> do forever
> wait 0.5 secs
> play midi note 60 for 0.5 beats
> we hear the first few notes get louder and then stabilise at noticeably louder. If the wait time is longer - say 1 sec - it doesn’t seem to happen. The same effect happens with drum ‘notes’ via MIDI too.

Do you mean only after image start, or every time you trigger the script?

I do not hear it - Mac VM 4.2.5b1u, Mac OS 10.9.5, 2011 MacBook Pro.

> The really odd part is that on the Pi there is *no* MIDI system making the noise - it is faked from an FMSound organ1 or SampledSound coffeeCupClink. And yet the user heard the effect; and I don’t.
> I’ve checked the actual MIDI control byte value being sent to set the volume and it doesn’t vary. On the Pi the volume value sent to to the sound player system doesn’t vary either. I even checked that I wasn’t going insane by getting my wife to listen and she heard it get louder.
> So my question is - is it wrong to take all the milk chocolate biscuits?

I don't mind, but don't event think about taking the pretzels.

- Bert -

-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 4142 bytes
Desc: not available
Url : http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20141106/56745f4e/smime.bin

More information about the Squeak-dev mailing list