Batch Windows Utility for Changing Audio Tempo, Music Key, andPlayback Rate
"2018 he played the cassette and recorded with a cellphone placed next to cassette players' speaker .."
???!!
At the very least, that cassette could be played on a decent
cassette deck, convert the output from its RCA to the mini
line in on a PC soundcard, then record the cassette audio
into a DAW for editing.
Recording off a speaker is akin to video recording off the
TV screen - from a 30-45° angle no less! - and posting the
results on YouTube. Embarrassing.
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