04-14-2021, 03:38 PM
USB Audio Player Pro is attenuating 15dB the signal it sends to the USB DAC despite having the volume control at 0dB.
If I play a sound file (1khz 0dBFS) on a FiiO K3 I get an output signal of 0.355 Vrms in line out.
If I play it from Android with VLC I get an output signal of 1.999 Vrms in line out. This is correct since FiiO k3 has in the specifications a maximum output of 1.9 Vrms.
I have done the test in a Redmi A6 phone and in a FiiO X5 III with the same result: 0.355 Vrms instead of 1.9 Vrms what is right.
Sorry for my English. It is not my native language.
If I play a sound file (1khz 0dBFS) on a FiiO K3 I get an output signal of 0.355 Vrms in line out.
If I play it from Android with VLC I get an output signal of 1.999 Vrms in line out. This is correct since FiiO k3 has in the specifications a maximum output of 1.9 Vrms.
I have done the test in a Redmi A6 phone and in a FiiO X5 III with the same result: 0.355 Vrms instead of 1.9 Vrms what is right.
Sorry for my English. It is not my native language.