Support Articles

302 Noise on Power On

Q: I experience a loud output noise when the mixer is powered up. It blasts the camera audio levels to maximum. The sound is a low thump combined with a much higher “beep” sound. Why?

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302 Input Channel Peak Indicators

The input channel peak LEDs indicate both pre- and post- fade peak levels on the 302. In early production mixers (before 2005) there are two resistors which make channel 2 and channel 3 not indicate post-fade peak levels. This minor condition is fixed on later units. Note that if the channel fader is below unity […]

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722, 744T, and 788T Hard Disk Drive Noise

The hard drive on 7-series recorders generates nearly imperceptible noise levels, and it is the only device with any acoustical noise output on the recorders. Unless one presses his or her ear against the unit they will not be able to hear the drive during operation.

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442 Gain Settings with 418S Microphone

Q: I have a Sennheiser MKH418s stereo mic to complement my kit and upon plugging it up to my 442 I have found the level to be very low.

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USBPre with SIA Smaart Software

by Pat Brown of Synergetic Audio Concepts, Inc. The Sound Devices USBPre overcomes many of the shortcomings of internal PC sound cards. Important benefits include balanced inputs, phantom power, analog level controls, meters, bus-powering to eliminate batteries and “wall warts,” and of course high-quality audio inputs.

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Oscillation with Transformer-Balanced Inputs

Condition Depending on several conditions, chiefly the microphone, the transformer-balanced inputs, such as those on the 302, 442, MixPre, MM-1, MP-1, and MP2, can get into an oscillating condition with a microphone that renders the audio unusable. This oscillation is often described as a “motorboating” condition since this low frequency oscillation sounds like a motor […]

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