dgick@silver.ucs.indiana.edu (damian gick) (05/11/91)
Could someone who has (or has used) PerfectSound let me know via E-Mail approxamately how many seconds I could digitize on a 1 meg Amiga 500. Basically I want to digitize samples for use in demos and games written in AMOS. Would I need a lot more memory to sample them? (Note: when I use them in the program I don't want them too big so they can't be run on a 1 meg 500.) Thanks, Damian J. Gick | Please send any mail to: | "...And keep on IU @ South Bend | | thinking free!" CSCI Undergrad | dgick@sbway.iusb.indiana.edu | --The Moody Blues
ammrk@swbatl.sbc.com (Mike R. Kraml) (05/12/91)
In article <1991May11.153758.662@bronze.ucs.indiana.edu> dgick@silver.ucs.indiana.edu (damian gick) writes: >Could someone who has (or has used) PerfectSound let me know via E-Mail >approxamately how many seconds I could digitize on a 1 meg Amiga 500. Well thats entirely a factor of sampling rate. If you are sampling at a rate of 20 KHZ (or 20 Thousand cycles per second), that is actually 20 Thousand bytes of data per second. You would actually use 20 Kbyte every second of time. In a 1 MB A500, after your up and running, you may have only 800K of RAM free or so, so you could get 800K/20K /Second or around 40 seconds of music (voice, whatever). That is assuming a 20KHZ sampling rate. If you cut that in half, say use 10KHZ sampling rate, you could get 80 seconds of sampling in your same 800K of free RAM. What you loose however, is fidility or actually frequency response. At 10KHZ, this gives you an effective frequency response of 5KHZ (someone's theory, but its true). 5KHZ is fine for voice type applications, but music will sound very flat (few highs), sort of AMish sounding. One other thing, if you sample in stereo, which the PerfectSound allows, you cut your sampling time in half (2 channels of sound instead of one). > >Thanks, NO problem, I hope this helps. See ya later, Mike... > >Damian J. Gick | Please send any mail to: | "...And keep on -- ============================================================================= Mike Kraml - Manager-Finance MECHANIZATION - SWBT - (the HARD Hack) UUCP: {uunet, bellcore, texbell}...!swbatl.sbc.com!ammrk =============================================================================