IVX
Major Contributor
Well, finally I got working Cosmos ADC with internal DSP and RIAA EQ implemented for all Fs from 44.1 to 384. A pair of Cosmos APU was used as a dual-mono phono preamp +34db gain with no analog RIAA, which was applied in Cosmos ADC digitally. The video is a comparison of LP vs CD sound, recorded this way.
The formal specs of such combo:
THD+N@5mV-40ohm(AP output) -81db
About the real SNR i.e. MM cartridge AT3600L connected to Cosmos APU with 1.2m RCA cable, stylus on the air, the turntable is On and the platter is spinning, the record is normalized to 0dbfs, the SNR for that conditions is 85db(A).
looks like 91db(A) but my very loud DJ LP has peaks up to -6dc, hence, 91-6=85db(A).
FFT has some spurs at 15 and 17kHz, they are floating and sometimes completely disappear. I guess this is an electro-car charger in the garage under my apartment.
The formal specs of such combo:
THD+N@5mV-40ohm(AP output) -81db
About the real SNR i.e. MM cartridge AT3600L connected to Cosmos APU with 1.2m RCA cable, stylus on the air, the turntable is On and the platter is spinning, the record is normalized to 0dbfs, the SNR for that conditions is 85db(A).
FFT has some spurs at 15 and 17kHz, they are floating and sometimes completely disappear. I guess this is an electro-car charger in the garage under my apartment.