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Products Developing commercial application software for Apple Macintosh computers for over 22 years (since 1985)

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Mac the Scope
	Professional quality signal analyzer, 1/3 octave RTA, signal generator, and more. Uses native Macintosh sound input capabilities or third party I/O device support (via Apple CoreAudio) Sound output port may simultaneously be used for test signal generation ("full duplex") with Waavebox Offline file analysis: arbitrary sample rates (up to 2 GHz), 8 / 16 / 20 / 24 / 32 bits per sample, arbitrary number of channels, AIFF and Sound Designer II file support The 1/3 octave RTA pioneered the use of digitally implemented analog filters (as we first demonstrated in 1999 at MACWORLD EXPO, San Francisco, and at the Audio Engineering Society Convention in New York) for unprecedented amplitude accuracy, out of band signal rejection and transient response for an RTA on a personal computer Many, many more features - and a functional (hands-on) demo is available Compatible with Mac OS X 10.2.6 and later
Waavebox
	Versatile, real-time, precision signal / waveform generator. Uses native Mactintosh sound output capabilities or third party I/O device support (via Apple CoreAudio) Precision waveform generation: 6 digits of frequency resolution; periodic waveforms are calculated with 64 bit math Intuitive, easy to use analog style signal generator user interface Optional add-on to Mac the Scope - or stand-alone application; included with Mac the Scope Complete A functional (hands-on) demo is available (included with the Mac the Scope demo) An economical Lite version is available with most of the features of the full version Compatible with Mac OS X 10.2.6 and later Limited-time offer: Waavebox and Waavebox Lite orders include a free copy of Mac the Scope SE (save $99)!

Pure Vinyl

High quality playback, transcription and editing of vinyl LP recordings. Click here for more information. Super High Resolution 192 kHz 24 bit Digital LP Playback, Conversion, and Editing Software Pristine 64 bit (Double Precision) Internal Signal Path; No Intermediate Rounding Operations High Accuracy (within ±0.005 dB between 20 Hz and 3 kHz; rising to < 0.2 dB @ 20 kHz) Standard RIAA Correction Curve Customizable Vinyl Correction Curves Our exclusive Zephrr® Zero-Phase Shift Rumble Reduction Filter for Resampling (Adjustable Frequency; up to 96 dB / octave) High Quality Automatic Resampling to 44.1 kHz 16 bit Digital Jukebox Format (CD, iTunes, iPod) Upsampling (to 192 kHz / 24 bit) Front-End for Playing iTunes Library Tracks Adjustable Subwoofer Crossover Noise-Shaped Dither for Word Length Reduction Unique "Scratch" Style, Grab & Spin Track Editor Continuous, Gap-Free Playback in Traditional Album Format Compatible with Mac OS X 10.4 and later; Universal Binary format (PPC and Intel) Many, many more features; a functional (hands-on) demo is available Coming soon: the Seta Megahertz Bandwidth Moving Magnet / Moving Coil Cartridge Phono Preamplifier

AudioLeak

Leq (Long-term Equivalent Level) Analyzer for audio files and sound input streams Peak, Unweighted RMS and A-Weighted RMS; Loudness Histograms Automatically Normalize Files Based on Analysis Results Accurate Conformance to A-Weighting standard* A-Weighting Supported Sample Rates: 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384 kHz Process Audio Files of Any Length Simultaneous multithreaded file processing and input audio measurement 200x real-time or faster: one hour of audio takes just seconds to process Quick and easy to use Compatible with Mac OS X 10.4 and later; Universal Binary format (PPC and Intel) Professional Version available: Batch file processing mode, Variable RMS Response, Logging, Automatic Analysis Saves, much more Demo available *Be Careful! We've found that a popular inexpensive Macintosh audio software application purporting to measure "A-Weighted Leq" is wildly inaccurate! Look at some test results here. FREE AudioLeak 1.1.1 still available (Mac OS X 10.4 only) Click the link to our download page, below, to download AudioLeak.

Channel D has been in the audio analysis software business for over 10 years (Mac the Scope 1.0 was released in 1997 at MACWORLD EXPO - when it was still held in Boston) and carefully validates the accuracy and performance of our own audio software. Channel D has been involved with commercial software development on the Macintosh platform for over 22 years (since 1985).

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