Audio Digital Conversion/Restoration
Vinyl Records and Cassettes to CD conversion ? This transfer of Analog sound to digital sound has become much easier, through several dedicated and also freeware Audio Recording software programs and plug-ins. The USB has lifted many limitations that there are USB Turntables, USB Cassette players to facilitate the Transfer/Conversion.
All these efforts/endeavours are geared to digitize the analog sound; so, naturally the digital codec and all pertaining factors are created ?to connect to the Computer ? the CPU? so that the Processing ? Digital manipulation like Amplification, Bass Boost, Fade in, Fade Out, etc. are made feasible.
However, the Front end tools ? the Turntable, Cassette player ? are still made and used as they are. Turntables still have the regular 33, 45 & 78 rpm speed; Cassette players play at normal speed.
With the improved processing speed, using faster Processor, higher FSB and larger RAM, it should not be much difficult to complex digital processing of sound!
The burden can be shifted/transferred to Digital Processing, to save the use and time of the Front end tools. In spite of faster processing, it still takes all 60 minutes or more to play and record a C-60 cassette, as in those days.
Why not increase the speed of these players ? dedicated machines to be used for Transfer or as an added feature to the normal Cassette player, so that the ?Play? time can be reduced.
CCP [Compact Cassette Printer] machines by SONY, OTARI record a C-60 minute cassette in less than 2 minutes, by running both ?Master? and ?Copy? at same but High Speed? Same technology used in Hi-Speed Dubbing of Portable Dual cassette players.
However, CCP machines copy/record both sides ? Side A & B simultaneously, whereas the Dual Cassette players copy/record only one side at a time.
The Speed of CCPs is not necessary, but 8x will be the Best! This will not tax/strain the motor or the machine too much. However a firmly built machine like REVOX, Grundig, TASCAM Spool Recorders will help.
C-60 Cassette ? as example:
Normal 1 7/8 ips 60 mts
2x 3.75 ips 30 mts
4x 7.5 ips 15 mts
8x 15 ips 7.5 mts
Player can be made to play sound 8 times faster and the emanating Sound can be recorded digitally at that faster speed, making provision for Side A and Side B as in CCP ? Hi Speed Cassette Copier machines. Hi-Speed Dubbing on Portable Dual cassette players copy only one side at a time.
This should not be very difficult as such programs are already in use as in mp3 Compression and de-Compresssion to WAV, and as in Nero CD Writing (Transfer of data at 13x, etc) and in iTunes (conversion at 13.3x)
Such a gadget will be a boon for all kinds of Restoration of Sound from analog sources.