CompuServe Thread

Digital sound

6 messages in this thread
#13005From: GARY SARFFMar 29, 1986 10:51 AM
I have gotten some of the sound files uploaded to my bbs by a person I know, and have found that you can concatenate the sound files by simply using the amiga join command. The most useful two to join are openpod.snd and hal.snd. just do join openpod.snd hal.snd as 2001.snd or something. This will give you a sound file that is 81744 bytes long if I remember right. The problem is that sound.exe that comes with them will only load and play upto 65535 bytes of sound data, so I wrote my own sound player in C that will play up to 131072 bytes, which the RKM says is the maximum you can do with one IORequest to the audio.device. From what I can see these sound files are not compacted or anything, they are simply a waveform since you can pass them as is to the audio.device to play, there seems to be no header info or anything. I have heard that the jukebox sound files though contain a header of 4 byte file length, followed by 2 byte sampling rate, followed by the wave itself, but I've never downloaded any jukebox sound so I am not sure. The only reason that the joined file sounds good is that openpod.snd and hal.snd were recorded at periods of 350 and 355 so it is pretty close, and I run 2001.snd and the mid-point of 352 and it sounds pretty good. Most of the other files have very diverse sampling rates so it probably wouldn't sound as good. Since the wave forms are like this in the file it is also easy to pick a section out, like a word for instance and simply make a smaller sound file, so you can cut and paste to your hearts content. Neat! Can't wait to get a digitizer. Bye.
#13015From: Brian NiessenMar 29, 1986 1:29 PM
Thanks for the info… Any chance of you uploading the player you wrote? Thanks, Bri * Reply: 13018
#13018From: GARY SARFFMar 29, 1986 2:26 PM
I will see about that today, (the uploading.) If I do it here it will be some days though before it becomes visible, how is the time delay over on PCS-155? * Reply: 13019 * RR 13015 +
#13019From: Brian NiessenMar 29, 1986 2:29 PM
Hary, it will be up in less than 48 hours on 155. Guaranteed!!! Oops, Hary = Gary. Am on Amiga after being on C128 for days… and not used to KB yet. Regards, Brian R. Niessen, 76703,4034/TPUG SYSOP * Reply: 13020 * RR 13015 +
#13020From: GARY SARFFMar 29, 1986 2:33 PM
I might as well reply anyway, I will upload the source and binary today then, I will see if there is any savings to using amigarc. You do have it I presume? If there is not that big a compression I won't bother, the source is only about 3500 bytes anyway. The binary is about 18K I think. * Reply: 13023 * RR 13015 +
#13023From: Brian NiessenMar 29, 1986 4:07 PM
Yes, have ARC, and love it. Easier than SQ then LAR. Bri * RR 13015