Sample Rate Conversion
On 05/01/2019 19:57, PStamler wrote:
On Saturday, January 5, 2019 at 10:17:01 AM UTC-6, mcp6453 wrote:
For whatever reason, I have some spoken word cassettes that were
recorded at 15/16 IPS that I want to transfer to digital. What's the
best way to digitally correct the tempo and pitch? Using Audition, I
recorded a segment at 88.2 and converted the playback sample rate to
44.1. Tempo and pitch are correct. Is that procedure the best way? Doing
them in software, at least using Audition, is not the way to go.
I think doing the conversion in software *is* the way to go, not by futzing with sample rates, but by using Audition's resampling speed-conversion function, which avoids the EQ hassles. It's not perfect, but it's damned good, and I think that's what you should do.
The EQ problems are with the analogue part of the system. Both 15/16 and
1 7/8 ips cassettes have very similar record equalisation profiles, and
playing a 15/16 ips cassette back at 1 7/8 ips will move the HF peak
response by an octave. It is, however, easy to compensate for this by
applying the appropriate eq to the resampled or sample rate altered file.
It may also be worth applying a noise reduction filter in the DAW software.
--
Tciao for Now!
John.
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