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Daniel's Collection

Return to Forever   01/24/1975

Unknown, Copenhagen, Denmark
Source Speed corrected revision

Source: FM>Reel to Reel Tape>CDR Phillips 880>EAC Secure>Flac Frontend>Level 6
Additional lineage: FLAC (16/44.1) > foobar2000 (combine tracks) > MATLAB > FLAC (16/48)
Checksums 01.flac:3d3804e3b693a7a9033591697e40de32
02.flac:908c88a3b09cbae6b58a9b85588c2a34
03 Celebration Suite.flac:2b2c2543f392cbda97033204a2ba7777
Media
Notes Original audio shared by Ricola on Jan. 25, 2007

Ricola Notes:
Another broken Reel to Reel tape which I repaired and just finished to transfer on CD.

Editing Notes:
-Original audio had a significant phase error with the left channel leading the right by on average 17 samples,
with some variation
-Automatic phase corrections to handle the variations
-Levels started off reasonably balanced, but the right channel became significantly weaker as the recording progressed
-Constant amplification of 3 dB to the left channel, and automatic, varying level adjustments to the right channel to
balance with the left

-Original audio was running considerably slow - almost a whole tone, 11.5%, but at least it was consistently off
-Because it was running so slow, the more appropriate new sampling frequency is actually 48 kHz instead of 44.1 kHz in
order to preserve more of the information that Ricola captured in the original transfer (not that there's actually very
useful detail in those high frequencies here - it's just tape hiss > 10 kHz)
-So instead of resampling (speed adjusting) by 11.5% to correspond to a 44.1 kHz sampling frequency, the resampling
factor was only 1.115*44.1/48 = 1.0244 or 2.44%
-All edits done in MATLAB
-ledwhofloyd (Ross), Jan. 2023
Trades Allowed Yes
Owned by Daniel · Last Updated Feb 7, 2026