That being said you will be hard pressed to hear an audible difference. Quality D/A A/D converters can run many US$1000's. The reason that TOSLink signals are not quite as good is that the quality of the circuitry is not there. I can go into more detail if you need but this is not your problem because you have both the mixer and laptop plugged in to the same AC power strip.ĭollars to donuts if you get a ground lift plug for $3.00 and plug your grounded laptop AC adaptor into that, your problem will be solved! Plugging in to the same strip will only help if your loop is induced by a difference in phase potential and timing. If your mixer has balanced outputs this is a certainty. Many mixer manufacturers take extra steps to ensure ground balance in the mixers power supplies. Your problem is likely the amp circuits in the laptop.
In order to alleviate the situation you either need to get the signal ground to exactly match the potential ground of the AC supplies on both the mixer AND laptop (difficult to do reliably) or you need to lift both AC ends off ground so neither has a reference to AC ground so the signal ground at either device floats independently which it should do. Quality of sound output is OK - Good and there are other brands / model out there, some running to many $100'sĬlick to expand.Your problem comes about due the fact that there is a voltage diference between ground planes established between the AC ground on your mixer, laptop and the signal ground. Catalog # 270-054) to connect between your mixer and Laptop. (~US$ 3.00) Ground Lift Plugģ/ Go to radio Shack or HiFi Suply house and pick up a Ground Loop Isolator (R.S. It basically has a 3 pin socket to connect to your laptop AC adapter and has a 2 prong plug and a ground screw tab for connection to older two pin sockets. (Total ~ $65.00) ToSLink ConverterĢ/ Go to a hrdware store or radio shck and pick up a Ground lift plug (RS Catalog # 61-2720). Remember though to connect optically not coaxially.
I always take two to gigs to use to isolate my firewire 410 from the mixer. Quality is quite good but not quite what a true Audiophile would want. Additional options.ġ/ Go to radio shack and pick up twoTOSLink Converters (Part numbers Toslink/coaxial (2-way) Converter Catalog # 15-1242) and a Fibre Optic cable This will electrcally isolate your Mixer recording outs from your laptop. The are several options and you know a couple of them already. As diagnosed by the team, you have a ground loop.
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