Black Cat Systems
Follow our tweets!

Mac OS X Software
Mac OS 9 Software
Windows Software
Ham Radio iPhone/iPad
Linux Software
Update Policy
Lost Reg Code?

Radiation Detectors
USB Icom CI-V Interface
MIL-STD-188 Interface

General Interest Programs

  Atomic Mac/PC
  Audio Toolbox
  Black Cat Timer
  Diet Sleuth
  Graph Paper Maker
  Health Tracker
  Knitting Wizard
  Label Wizard
  Prog Audio Gen
  Sound Byte
  Synth 76477

Amateur Radio Programs
  Black Cat CW Keyer
  Cocoa 1090
  Cocoa RTL Server
  DGPS Decoding
  DX Toolbox
  eQSL Factory
  Morse Mania
  RF Toolbox

iPhone/iPad Apps
  Atoms To Go
  dB Calc
  Clik Trak
  DGPS Decoder
  Drill Calc
  DX Toolbox
  Elmer Extra
  Elmer General
  Elmer Tech
  Feld Hellschreiber
  Field Strength Calc
  Function Generator Pad
  HF Weather Fax
  Morse Mania
  Morse Pad
  Packet Pad
  PSK31 Pad
  SSTV Pad
  Photon Calc
  Rad Map Tracker
  RF Link Calc
  SelCall Tone Gen
  Sound Byte
  Sound Byte Control
  Spectrum Pad
  SWBC Schedules
  Synth 76477
  Synth Motion
  Transmission Line Calc
  Weather Calc
  Wire Calc

iPhone/iPad Bundles
  RF Calculator Apps
  Ham Radio Decoder Apps
  Audio Utility Apps
  Shortwave Weather Apps
  Ham Radio Exam Study Apps
  Shortwave Decoder Apps

Android Apps
  Audio Function Generator
DGPS Decoder
  HF Weather Fax
  Rad Map Tracker
  SelCall Tone Gen
  Sound Byte Control
  SWBC Schedules
  Wire Calc

About Black Cat Systems
Geiger Counter
Site Map
Our software for Mac OSX
Privacy Policy
Apple /// Emulator

Macintosh Links
Shortwave Radio
Pirate Radio
Spy Numbers Stations
Science and Electronics
Ham Radio Software
Geiger Counters



MacDSP Screen Shot

What is it?
MacDSP is a digital filter for Macintosh computers with a PowerPC processor. It is currently under development. But you can download a copy of the latest release, and give it a try. Your comments and suggestions, as well as bug reports, are certainly appreciated.

What's in the latest version?
The latest version of MacDSP breaks the audio spectrum up into ten bands, the amplitude of each band can be controlled. The bands are spaced on a geometric basis (that is, they are not linearly spaced). Each band is made up of a second order Bessel filter, designed to pass only the audio frequencies within that band. It works much like an equalizer does in your stereo.

How does it work?
You connect your audio source to the Mac's microphone jack, select the low and high pass frequencies, and MacDSP will do the rest.

How much does it cost?
MacDSP is free. Just download a copy, and give it a try.

What do I need?
MacDSP is only available for PowerPC equipped Macintosh systems. No Windows version is available. Intel processors are probably too slow, anyway.

You can download a copy of MacDSP in BinHex format (Version 0.3.0 188k)

What if it doesn't work?
MacDSP creates a file called STARTUP_STATUS_DEBUG when it runs. This shows step by step what the program did while it started up, and after it was told to quit. It can be quite useful to me if you're reporting a bug. It's a text file, so you can include it with your email, or attach it. (including it is preferable, that way I won't have as many attachments laying around)

Warning: require(../pages/pages.html) [function.require]: failed to open stream: No such file or directory in /usr/www/users/bcs/software/macdsp.html on line 98

Fatal error: require() [function.require]: Failed opening required '../pages/pages.html' (include_path='.:/usr/local/lib/php') in /usr/www/users/bcs/software/macdsp.html on line 98