duggie@jessica.stanford.edu (Doug Felt) (11/12/88)
I am trying to play a sampled format 2 'snd ' resource using the sound manager. I open a channel using the sampledSynth, load the resource, issue a bufferCmd using a pointer to the sound buffer portion of the resource, and get sound-- but at the wrong rate. I have tried issuing a rateCmd before playing the buffer, but it seems to have no affect. Neither does ampCmd, although perhaps the sound has to be currently playing. I have tried issuing soundCmd before the bufferCmd and this seems to make no difference. I do things in this rather awkward way because I want sounds to play asynchronously of other activity (animation) and I was having trouble getting SndPlay to handle format 2 'snd ' resources at all, let along playing them asyncronously. Could someone please tell me what I am doing wrong? Thanks. Doug Felt Courseware Authoring Tools Project Sweet Hall 3rd Floor Stanford University Stanford, CA 94305 duggie@jessica.stanford.edu
gollman@tuvie (Georg Gollman) (11/21/88)
I'm having trouble using the Sound Manager, maybe my documentation (final APDA draft of IM V) or my system software (system file 4.2 on a MacII) is just too old ... Anyway, what I want to do is to use more than one channel on the sampled sound synthesizer, but only the first channel I open (SndNewChannel) plays. BTW, the order of channel initialisation (soundCmd) has no effect. Any ideas, any experience with the SM ??? Georg Gollmann e-mail: gollman@tuvie.uucp TU Wien, EDVZ tel: (222) 58801/3611
han@Apple.COM (Byron Han, Architect) (12/02/88)
In article <638@tuvie> gollman@tuvie (Georg Gollman) writes: > > > >I'm having trouble using the Sound Manager, maybe my documentation (final APDA >draft of IM V) or my system software (system file 4.2 on a MacII) is just >too old ... > >Anyway, what I want to do is to use more than one channel on the sampled sound >synthesizer, but only the first channel I open (SndNewChannel) plays. BTW, the >order of channel initialisation (soundCmd) has no effect. > >Any ideas, any experience with the SM ??? > First off, you should try and get ahold of the latest system software - 6.0.2 I believe is the latest. Secondly, are you freeing the sound channel via SndDisposeChannel or passing a freeCmd via SndDoCommand? It seems like the channel and synthesizer resources are not being freed up so that other calls are failing to produce sound. Hope this helps. +-----------------------------------------------------------------------------+ | Disclaimer: Apple has no connection with my postings. | +-----------------------------------------------------------------------------+ Byron Han, Communications Architect Macintosh xxx: The Next Generation... Apple Computer, Inc. ------------------------------------- 20525 Mariani Ave, MS27Y Internet: han@apple.COM Cupertino, CA 95014 UUCP:{sun,voder,nsc,decwrl}!apple!han -------------------------------------- GENIE: BYRONHAN ATTnet: 408-974-6450 Applelink: HAN1 CompuServe: 72167,1664 ------------------------------------------------------------------------------
oster@well.sf.ca.us (David Phillip Oster) (04/11/90)
If you read the fine print, you'll discover that the Sound Manager does not
implement 4-voice sound on a MacPlus, or an SE. You should probably just use
Sound Driver. It is what Hypercard uses to do telephone touch tones.
Another problem: The sound driver loads 1/60 sec of sound at a time into
video memory, synthesized from the parameters in the Sound driver parameter
block. If your rythym requirements make you divide time into finer intervals
than 60 parts per second, you'll have to give up on the managers and access the
sound buffers directly. Heaven help you when you want to be compatible with
future machines.
--
-- David Phillip Oster - Note new address. Old one has gone Bye Bye.
-- oster@well.sf.ca.us = {backbone}!well!oster