Spectrogram Help: Poulenc's Organ Concerto

[Jay-dub]

A 16kHz whine often indicates that there was a television monitor in the room when the recording was made. The ultrasonic noise would come from DS modulation. It is likely that the signal went through a DSD64 stage at some point.

 

 

Sent from my iPhone using Computer Audiophile

[Jay-dub]

I should add that the original CD release was in 2001 from Linn. The CD booklet gives no indication what the original recording format was.

On such an old recording, perhaps the most likely explanation for what we're seeing is that the the original ADC ran internally at 64x, 1-bit, and output PCM with some observable DS modulation noise. In that case, the original master format could be 24/88 that looks converted from DSD, even though DSD was never recorded. This isn't a possibility that I considered when I assumed that I was looking at a fairly new recording – almost all modern ADCs are going to run at a much higher rate internally.