I was thinking either MP3 at 256 or WAV at 11kHz.
The tape is one inch wide.
On Thu, 13 Jul 2017 at 4:52 Tim Gillett <[log in to unmask]> wrote:
> Hi Shai,
> No replies so far to the specific question so here goes. Yes given the
> source I'd have no problem reducing down to 22kHz or even 11
> I would have thought MP3 at 256 kB/s (mono) would be more than adequate
> It seems unlikely either would be anywhere near compromising the original
> I take it that if the source noise floor is not compromised in the file
> compression process, then by definition everything else will be fine also.
> With MP3 type compression though, if it's set at too low a bitrate, tape
> dropouts can become exaggerated, (eg: many YT uploads ) so just to be safe
> I'd go for an MP3 rate to avoid that.
> At 15/32 ips azimuth alignment must be fairly critical. Out of curiosity
> how wide is the 40 track tape?
> Tim Gillett
> Western Australia
> ----- Original Message -----
> From: "Shai Drori" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Sunday, July 09, 2017 2:19 PM
> Subject: [ARSCLIST] Small file formats
> Hi Gang
> Seeing the wisdom of the group. I am digitizing log tapes for a client.
> Tapes are 40 tracks each generating 400GB per tape at 48kh/24bit. Obviously
> there is nothing on those 15/32" IPS tapes that needs that fidielity, and
> my client doesn't have the storage capacity for all her tapes (lot of
> them). So the question is what format should we compress to. MP3 at 256KB/s
> is one option, staying with wave but reducing the sampling to 22Khz/16bit
> is another (not sure it's small enough), maybe even 11Khz? Other options?
> As you can imagine the audio is worse than AM but I do want to keep it as
> close to the original as possible. Manufacturer claims top freq at around
> שי דרורי.
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> Shai Drori
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מומחה לשימור ודיגיטציה של אודיו וידאו ופילם 8-35ממ
Expert digitization services for Audio Video
Hi Res scanning for film 8mm-35mm
Timeless Recordings Music Label
[log in to unmask]
Tripadvisor level 5 contributor, level 10 restaurant expert