[vcf-midatlantic] talk at VCF-East on audio cassettes for data; stuff

Richard Cini rich.cini at gmail.com
Thu May 10 19:35:16 EDT 2018

Herb --

	This is an interesting topic because I did some work on this for the Altair32 Emulator. I just dug the code out and it was just about 10 years ago. I was trying to add the ability to directly read WAV files (22050Hz, 8-bit) from within the emulator and Bob Grieb helped me with the Fast Fourier Transform code needed to make it work and tought me a bit about DSP and filter design. The add-on basically became a WAV-to-digital converter based on the Altair ACR recording format. I don't think it ever made it into the main code tree because of the inability to locate WAV images at the time.

Rich Cini

On 5/10/18, 5:45 PM, "vcf-midatlantic on behalf of Herb Johnson via vcf-midatlantic" <vcf-midatlantic-bounces at lists.vintagecomputerfederation.org on behalf of vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:

    my home page starts with Web links to my VCF-East talk, and to a Web 
    page stuff I'll be selling there as a vendor.
    There are adults alive today, who have *no idea* what an "audio 
    cassette" is! Shocked me. Learn how the Ancients communicated in tones! 
    Lost technology, recovered by experts, even as we speak. Voices from the 
    Less exciting fare. I'm adding more by the day. Lights that blink, 
    boards covered with chips, clicky keyboards. Some of you know me - ask 
    me about something I have you don't see.  Root around my domain to see 
    more. No IMSAIs No Altairs pls, light stuff OK? Surprisingly, I don't 
    get axed much, about old Macs.
    Herb "The Beep" Johnson
    Herbert R. Johnson, New Jersey in the USA
    http://www.retrotechnology.com OR .net

More information about the vcf-midatlantic mailing list