From bgarcia@kth.se Tue Aug 16 14:49:55 1994 Path: ashpoly!cascade!bigsur!kth!bgarcia From: bgarcia@kth.se (Bruno García) Newsgroups: comp.sys.m68k Subject: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug16.144955.5586@kth.se> Date: Tue, 16 Aug 1994 14:49:55 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. I wrote a 64-tap FIR filter in pure 68k assembly using movem.l and dbra loop unrolling to downsample to 64 Hz. Source code and executable will be released on Aminet under mus/misc/stardust_amiga.lha next week. -- Bruno García -- Royal Institute of Technology, Stockholm "Tape doesn't lie at 02:14. Ears do." From fgirard@cam.ac.uk Tue Aug 16 19:27:55 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!cam!fgirard From: fgirard@cam.ac.uk (Fiona Girard) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug16.192755.8408@cam.ac.uk> Date: Tue, 16 Aug 1994 19:27:55 GMT References: <1994Aug16.144955.5586@kth.se> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Aug16.144955.5586@kth.se>, bgarcia@kth.se (Bruno García) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Fiona Girard Zyxel U-1496E @ 19,200 bps "They will send a copy in my place." From mgirard@hanse.de Thu Aug 18 08:41:55 1994 Path: ashpoly!cascade!bigsur!hanse!mgirard From: mgirard@hanse.de (Min-jun Girard) Newsgroups: comp.sys.m68k Subject: Re: Data: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1994Aug18.084155.5799@hanse.de> Date: Thu, 18 Aug 1994 08:41:55 GMT References: <1994Aug16.144955.5586@kth.se> Organization: Hanse-Netzwerk Hamburg NNTP-Posting-Host: hanse.de X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Aug16.144955.5586@kth.se>, bgarcia@kth.se (Bruno García) writes: > Testing custom audio input routines on an Amiga 1200 with a standard parallel-port sampler. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Download failed on Aminet mirror. Can someone mail me an ADF floppy disk image? -- Min-jun Girard -- Hanse-Netzwerk Hamburg "The carrier frequency does not drift by accident."