Passionate music lovers have been searching for quite a while now for ways to compare digital audio formats. Up until now, it's been pretty difficult to find recordings from the same source made under standardized conditions using the same, reproducible technology in five different formats.
For this demonstration, Stockfisch selected a large mechanical 16" cylinder music box and an analog magnetic reel-to-reel tape. Both sources were able to be recorded identically and without losses five times. The 16" cylinder music box generates signals up to 50 kHz at close range. So they decided to use DPA 4041-S microphones that are able to capture such high frequencies. This feature directly contrasts nearly all common studio microphones that stop gently at 20 kHz.
The second sound sample originated from an analog reel-to-reel tape. The multi-track recording was made in 1983 on a AEG/Telefunken M-15A 16-track (2") while the stereo mix was done on a Telefunken M-15A 2-track (1/4"). The guitarist Andreas Rohde is playing his composition "My Uncle Oswald". This was published again in 2016 as part of the Stockfisch Series "Analog Pearls Vol. 2" (SFSA4802).
For analog-to-digital conversion they used the HAPI A/D/ Audio Interface of Merging Technologies. It is able to transfer the analog signals of both sources into five respective digital audio formats:
16 bit / 44.1 kHz (CD Audio)
24 bit / 96kHz
24 bit / 192 kHz
1 bit / 2.8224 MHz (DSD 64 = SACD)
1 bit / 5.6448 MHz (DSD 128)
For each recording, Stockfisch have created a graphic protocol using the audio analysis tool, "musicscope". This protocol illustrates all relevant audio parameters. Hopefully, you can gain interesting insights through this listening comparison: Trust Your Ears!
USB Flash drive
Housed in Blu-ray sized plastic case
44.1 kHz, 16-bit (CD)
96 kHz, 24-bit
192 kHz, 24-bit
2.8 MHz, 1-bit (DSD-64 = SACD)
5.6 MHz, 1-bit (DSD-128)