serendipitydawg
Dag nabbit!
I've started to digitise my stash of mainly off-air cassette recordings. Is any bit-depth or sampling frequency in excess of 16/44.1 a waste of disk space?
16/44.1 is orders of magnitude more than cassette or vinyl technically. More than sufficient.
I'll disagree for vinyl. You can get quite high frequencies out of a record, surprisingly high. For example, there were quadraphonic records with 4 channels encoded onto the 2 left/right channels using FM with a 30Khz carrier, so basically the 'rear' channels were in the range 20-40Khz, which would suggest it is possible there are records out there with real information above 20Khz. This would suggest an 88.2k sample rate might be necessary.
I agree that 16 bits is more than enough to capture the dynamic range.
Why do we need 20khz plus when most adults can’t hear past 15khz and declines with age.
I'll disagree for vinyl. You can get quite high frequencies out of a record, surprisingly high. For example, there were quadraphonic records with 4 channels encoded onto the 2 left/right channels using FM with a 30Khz carrier, so basically the 'rear' channels were in the range 20-40Khz, which would suggest it is possible there are records out there with real information above 20Khz. This would suggest an 88.2k sample rate might be necessary.
I agree that 16 bits is more than enough to capture the dynamic range.
Except on most albums they had a filter at 16khz to prevent the cutting head from overheating. The Scully Westrex combo had an even lower filter point.
quality mics tend to give up before 20Khz
Why do you say that Cesare? Lots of dynamics and ribbons certainly but most decent condensers will have a reasonably constant frequency response up to 20Khz.
Here's a KM184 for example: http://recordinghacks.com/microphones/Neumann/KM-184
1)
3) From the late seventies on an awful lot of LPs were cut through a digital delay line, sampling at 44.1, 48, or 50kHz. Nothing above 20kHz from them except distortion. There exist LPs with ‘meaningful’ content up to 25 or even 30kHz, but they are very rare.
Yes, but something ubiqutous like a 414 is peaking around 15k and it's down probably 6db by 20Khz. Oh hang on, that site has the graphs: http://recordinghacks.com/microphones/AKG-Acoustics/C-414-XL-II
I've no idea of the bandwidth on analog multitrack, it's probably a bit rubbish, as they tended to squeeze more channels in rather than go for absolute quality, as that's what studios were screaming out for. The only large multitrack i've used was a tascam 16 track, and that was clearly made for project/semi-pro markets, and that market was quickly swallowed by ADAT and the digital revolution.
Yes.I've started to digitise my stash of mainly off-air cassette recordings. Is any bit-depth or sampling frequency in excess of 16/44.1 a waste of disk space?