trebor@lkbreth.foretune.co.jp (Robert J Woodhead) (05/01/91)
I'm working on a part-time project that, amoungst other things, needs a Mac to be able to determine when sounds start and stop. What I'd like to do is use my MacRecorder. What I am looking for is software that I can hook into my MPW program that let me: Initialize the Macrecorder Get a sample of the current input (eg: the next "byte") Clean up afterwards My current theory is that by just reading in samples and averaging the last N or so, I can get a pretty good "level" meter that will be able to determine the start/stop of sound bursts to within .01 second or so. Anyone know where I can get such software? Thanks. -- +--------------------------------------------------------------------------+ | Robert J. Woodhead, Biar Games / AnimEigo, Incs. trebor@foretune.co.jp | | "The Force. It surrounds us; It enfolds us; It gets us dates on Saturday | | Nights." -- Obi Wan Kenobi, Famous Jedi Knight and Party Animal. |
kinsey@athena.cs.uga.edu (Kevin Kinsey) (05/01/91)
In article <9297@lkbreth.foretune.co.jp> trebor@lkbreth.foretune.co.jp (Robert J Woodhead) writes: >I'm working on a part-time project that, amoungst other things, needs a Mac >to be able to determine when sounds start and stop. What I'd like to do is >use my MacRecorder. > >What I am looking for is software that I can hook into my MPW program that >let me: > > Initialize the Macrecorder > Get a sample of the current input (eg: the next "byte") > Clean up afterwards > >My current theory is that by just reading in samples and averaging the last >N or so, I can get a pretty good "level" meter that will be able to determine >the start/stop of sound bursts to within .01 second or so. > >Anyone know where I can get such software? Thanks. > >-- >+--------------------------------------------------------------------------+ >| Robert J. Woodhead, Biar Games / AnimEigo, Incs. trebor@foretune.co.jp | >| "The Force. It surrounds us; It enfolds us; It gets us dates on Saturday | >| Nights." -- Obi Wan Kenobi, Famous Jedi Knight and Party Animal. | I know that the new sound manager in 6.0.7 and (even better) in 7.0 will do much of what you want to do, but the big question is: Does the driver that comes with the MacRecorder take into account all the nifty new routines that are now available? Does anyone out there know? Inquiring minds want to know... Kevin Kinsey UCNS University of Georgia Athens, GA kinsey@athena.cs.uga.edu
REEKES@applelink.apple.com (Jim Reekes) (05/03/91)
In article <1991May1.033605.12078@athena.cs.uga.edu>, kinsey@athena.cs.uga.edu (Kevin Kinsey) writes: > > In article <9297@lkbreth.foretune.co.jp> trebor@lkbreth.foretune.co.jp (Robert J Woodhead) writes: > >I'm working on a part-time project that, amoungst other things, needs a Mac > >to be able to determine when sounds start and stop. What I'd like to do is > >use my MacRecorder. > > > >What I am looking for is software that I can hook into my MPW program that > >let me: > > > > Initialize the Macrecorder > > Get a sample of the current input (eg: the next "byte") > > Clean up afterwards > > > >My current theory is that by just reading in samples and averaging the last > >N or so, I can get a pretty good "level" meter that will be able to determine > >the start/stop of sound bursts to within .01 second or so. > > > >Anyone know where I can get such software? Thanks. The MacRecorder driver for the new Sound Manager supports level metering. The Apple built-in driver supports VOX (voice activated levels to trigger start and stop of recording) but the MacRecorder currently doesn't. Jim Reekes E.O., Macintosh Toolbox Engineering