I never understood how high speed duplication worked, or was supposed to
work. Cassette tapes have a very limited frequency response as it is,
thus it seems to me that at higher speeds a lot of the audio content
would be sent to the recording head at higher frequencies than either it
or the tape itself were designed to handle.
On 11/10/2015 18:38, Tom Fine wrote:
> My father had been in the
> tape duping business, in fact one of the first cassette dupers in the
> US. He told me all the compromises and problems involved with high speed
> duplicating, and opined that cassettes were designed as dictation media,
> and they worked great for that but not for high fidelity music
> transmission. He was right.