Hi,
I'm looking to record mixes using audacity from a DJ mixer record out.
The output gain from the mixer is reduced by -8dB, which I'd like to correct somewhat by setting the input gain on the DAC+ ADC to a 12dB increase.
I'm having trouble reading the table on the datasheet:
https://www.hifiberry.com/docs/data-sheets/datasheet-dac-adc/
Is there a diagram somewhere I can follow? The table shows a completely different number of pins to the board, so it doesn't make sense to me.
The diagram on the data sheet shows exactly the jumpers on the DAC+ ADC. There are 4 jumpers - 1 to 4, where 1 is the top jumper.
So for a 12dB increase, I would remove the jumper connector that is sitting vertical way and leave the one sitting horizontal at pins 1 (at the top)? If so, I tried this and audacity doesn't seem to show a change in the monitored gain.
Okay, so the 1 and 0's in the rows don't have any relevance to the pin numbering, they're 0 = off, 1 = on.
Pin 4 has a dash as it should be unused.
Just for anyone who has the same problem.
Yes, that's correct
hi, I to have trouble understanding the table in https://www.hifiberry.com/docs/data-sheets/datasheet-dac-adc/
I really want to be sure before setting jumpers. My guess is this:
That's correct. The second jumper in the "on delivery" setting has no effect. Therefore the default is 0db gain
Thank you for the quick answer.
- Where can I find technical information about the card, like input- and output impedance, levels in dB(m/u) etc.?
We don't provide in-depth technical data, but I can answer this here:
- input resistance depends on gain and it between 5kOhm and 22kOhm
- output resistance: about 500Ohm
- max input/output levels: 2Vrms sine (about 6Vpp)
OK, its about 9 dBu then (and optimal at 0 dBu). I assume this is when set to 0 dB gain.
- Is high input resistance on low gain or the other way around?
Good So it is 0 db on delivery. I forgot to look before assembling the steel metal case. No way to check it in software for any chance ?
Did hook up the function generator of my scope. Starts to get something at 20 mV and I went up to 2 V pp .
No way to check in software, but standard setting is 0dB gain.
Bump:
- Is high input resistance on low gain or the other way around?
Just out of curiosity: Why is there the fourth row? Is there any use for it or can it be used to store the second jumper?