German 78 rpm record.
Deutsche Grammophon, recording ca. 1903, Berlin, Germany, recording engineer: Max Hampe
Professor Heinrich Grünfeld, Berlin. Cello.

047852 / 269s / 65289


-transferred from the original 78 rpm records at 78 rpm with a standard USB turntable (DJ Tech Vinyl USB 10 with Audio Technica AT-91 system) equipped with special needle ATN-78 (65µm). Turntable speed adjusted to correct pitch.
-digital mono conversion
-declicking/decrackling with ClickRepair (Wavelet, 100%, 100%, all)
-Audacity:
-48 db high pass filter below 20 Hz
-digital pitch correction
-normalisation to 0 dB
-Reaper EQ:
-Type Low Shelf, Freq. 283 Hz, Gain 9.5 dB, Bandwidth 0.7 oct
-Type Band, Freq. 2103 Hz, Gain -3 dB, Bandwidth 2.6 oct
-Type Band, Freq. 14291 Hz, Gain 17.1 dB, Bandwidth 2.0 oct
-Type Low Pass, Freq. 11327 Hz, Gain 0 dB, Bandwidth 2.0 oct
-Type High Pass, Freq. 46 Hz, Gain 0 dB, Bandwidth 2.8_ oct
-Audacity:
-normalisation to 0 dB
Spatial enhancement (for unprocessed mono, please listen to left channel only):
-prepare 3 copies of the monaural track (1, 2, 3)
-1, 2, 3: normalise to -4 dB
-2: switch to left channel
-3: switch to right channel, add 10 ms silence to the beginning
-2,3 join as stereo track
-mix 1 (-9 dB) with (2,3) (+2 dB)
-adjust balance
-normalise result to 0 dB