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Gear / Technical Help => Post-Processing, Computer / Streaming / Internet Devices & Related Activity => Topic started by: tapeworm48 on April 12, 2014, 03:06:36 PM
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I'd like to amplify the levels on a tape I made 8 years ago. It looks like levels peak at -14.
The concert was recorded on a Sony D100 DAT recorder.
Master DAT transferred Sony R300 > Digi Coax > M-Audio Fast Track Pro > USB > Audacity @ 48kHz.
Any suggestions for how to accomplish amplification without adding to much noise/hiss? Or what is the max amount of dB's suggested that this should be raised? I'm aware of the Amplification feature in Audacity but I fear just amplifying it 14 dBs will introduce noise.
Thanks in advance.
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Digital level adjustment won't add any noise.
It will raise the noise that is already present on the recording by the same amount as the music. It's basically the same as turning up the playback volume, except without whatever noise the playback system itself contributes when cranked up higher.
Just make sure the maximum level remains at least a dB or two below 0dBFS, and don't feel compelled to boost everything that much just as standard procedure. Some music is more appropriate with a lower level so the resulting volume knob setting is reasonable relative to other music.
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I tend to use Waves RVox Compressor/Gate. The downward expander is not a conventional "on/off" gate. It provides a gentle reduction of the noise floor by means of a soft knee behaviour. You set it by ear and instead of sections of sudden absolute silence, which can be very noticeable, the unwanted noise is reduced but still there while, if necessary, the overall level increased by the compressor. Worth a try if you have it.