Recording music from a computer to a tape recorder. The art of audio

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Recording music from a computer to a tape recorder

The art of audio

How to get rid of noise? Adviсe.

1. High-frequency noise most likely appears due to the fact that the sample rate breaks through the output of the sound card. By itself, it is not audible, but it can give beats with the bias frequency in the tape recorder, which fall into the region of audible frequencies. To combat this, you should include a filter between the card and the tape recorder that suppresses frequencies above 22 kHz (you can try the equalizer). In another case, a similar effect (noise) may be due to the excitation of some kind of amplifying stage. In this case, careful shielding of signal circuits is needed, especially input from output. It is very effective in such cases, along with shielding, grounding (connect the computer case and tape recorder to the heating pipe).

2. Try to use a low-pass filter with a cutoff frequency of 17-18 kHz, using a shielded cable, where the signal wires and the common wire are pulled by separate shielded wires (the braids of different wires should not touch each other), and the braids and the common wire are connected at one point at the tape recorder connector . Perhaps the tape recorder has a lower-impedance input - connect to it. And, most importantly, remove the tape recorder away from the computer, especially from the monitor, you may have to orient in space with a minimum of interference.

3. Perhaps the reason is the poor shielding of the cable connecting the tape recorder to the computer or poor contact in the connector. The first thing to check is the cable. Then check if there are these noises in the computer speakers, whether they appear when the tape recorder is connected in recording mode and without it, if there are noises in the tape recorder speakers during recording, try to record sound on another tape recorder, switch (if possible) the sound card output to linear or after the power amplifier (this is done by jumpers on the board itself). It is possible to give more detailed advice only with a clear localization of the source of interference. Perhaps the interference is induced through the network or directly to the recording amplifier. In this case, you should install a surge protector or try to take the tape recorder away from the case and computer wires.

4. Look in the sound settings so that the signal from the line input (input!) Is not received (there is a checkmark for "off"). This usually affects overwriting. There is no useful signal, but there is background and noise. There should also be a well-shielded wire, and even better, shunt all inputs and outputs of the wire to a common wire with capacitors of 0,01-0,068 microfarads.

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