milo@ndmath.UUCP (Greg Corson) (05/04/89)
I have a game which currently plays sampled sounds out of "snd" resources.
Sometimes I would like to have two or more sounds playing at the same time,
mixed together. For example, background music with gun shounds dropped in
on top of it when the player shoots.
Anyone got any good ideas on how to do this?
Greg Corson
19141 Summers Drive
South Bend, IN 46637
(219) 277-5306
{pur-ee,rutgers,uunet}!iuvax!ndmath!milo
jmunkki@kampi.hut.fi (Juri Munkki) (05/05/89)
In article <1378@ndmath.UUCP> milo@ndmath.UUCP (Greg Corson) writes: >I have a game which currently plays sampled sounds out of "snd" resources. > >Sometimes I would like to have two or more sounds playing at the same time, >mixed together. For example, background music with gun shounds dropped in >on top of it when the player shoots. > Ok. Dig up the technote about playing sounds without the click. Then write a cdev that mixes two (or more) sound sources and feeds that to the sampled sound synthesizer. It is a bit tricky, but it works on all current Macintosh models. How do I know that it works? Well, I wrote a VBL task and a sound file converted that converts sound to a format suitable for mixing. It uses a maximum of two channels, but the same idea could be used to create more channels. There are some other restrictions too. You can only play the sounds at 11 Khz (easy to change by rewriting some of the code). You can't play different notes with a single sound. These limitations aren't too bad if you are writing "dark castle"-style sound F/X. The VBL task is documented, but the sound converter is ugly and I would like to write some documentation. My idea was to send this to the usenet programmers guide as an example of VBL tasks and the sampled sound driver. It's written in LSC, but it is very easy to convert it into a resource that can be run at the beginning of the program. Some related routines can be written in almost any language that supports the toolbox. Can I get a free "Milo", if I mail it to you? ;-) _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._ | Juri Munkki jmunkki@hut.fi jmunkki@fingate.bitnet I Want Ne | | Helsinki University of Technology Computing Centre My Own XT | ^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^