Reply to hercules rmx sound card quality

The audio codec in DJ Console Rmx is a Wolfson WM8770.

It is a 24-bit / 192 KHz codec with
- a digital to analog converter (DAC) Signal to Noise Ratio of 106dB (A weighted at 48KHz),
- an analog to digital converter (ADC) Signal to Noise Ratio of 102dB (A weighted at 48KHz).

http://www.wolfsonmicro.com/uploads/.../en/WM8770.pdf

The second 24-bit / 192KHz stereo ADC (coming in addition to the ADC integrated in WM8770) is a Wolfson WM8781 whose signal to noise ratio is also 102 dB (A weighted at 48KHz).
http://www.wolfsonmicro.com/uploads/.../en/WM8781.pdf

The quality of the codec and the additional ADC are excellent.

For latency reasons, DJ audio interfaces operate only up to 44.1-48KHz, even if the hardware has higher capabilities.
- Serato Scratch Live operates up to 48KHz (http://www.scratchlive.net/about/scratchlive/)
- Torq Connectiv operates up to 48KHz (http://www.m-audio.com/products/en_us/TorqConectiv.html)
- ESI Maya 44 USB, U46DJ, U46XL operate up to 48KHz (http://www.esi-audio.com/products/?m=23)

DJ Console Rmx WM8770 codec is a 24-bit / 192 KHz, but the DJ Console Rmx plays audio files only up to 16-bit / 24-bit in 44.1KHz and 48KHz, since playing higher resolutions would not be useful for DJing (as higher resolutions files would be slower to load in the DJ software, and as the buffers would be bigger, it would increase the latency which is not good for live performance).

Big DJs mix either with
- vinyl discs (then the sound is not digital, so Khz and bits are not relevant to measure it)
- CDs : then the sound is sampled in 16-bit / 44.1KHz
- audio files extracted from CDs : then the sound is still sampled in 16-bit / 44.1KHz
- audio files extracted from DVDs: then the sound is either sampled in 16-bit / 48 KHz or 24-bit / 48 KHz.

So yes, the Rmx audio quality is good enough to mix in clubs or festival.
What you must check is that the output level of your audio source (Rmx or analog mixer) matches the input level required by the amplifier or patch-bay to which you are connected (to avoid saturation), that you have no ground loop (to avoid noise), and your computer and your amplifier are connected to the ground (to avoid growing differences of potential, which can be dangerous and create discharges similar to electro-static discharge but due to the difference of potential between the different devices you use.