the process of improving the quality of recorded audio, especially
audio that is very old or was poorly recorded.
software tools we have at Polkasound are specifically
designed for improving and restoring audio quality. Four of the
key software tools we use for audio restoration are:
- Noise Reduction:
Using our powerful software, a portion of the unwanted background noise
(i.e. tape hiss) is digitally sampled. The software then
"listens" to the music while we control how much of the sampled noise
- Snap! Crackle! Pop!
78, 45, and 33RPM records are notorious for their noise, so it's no
surprise that software programs were created just for the detection and
removal of it. We have some of the best software available. Where
more thorough noise removal is required, we can also reduce or
remove most noises manually.
- Bass and Treble
Enhancement: Normal equalization simply amplifies or
attenuates selected frequencies. Our software also allows us to
enhance the high and low end of recordings by
adding pleasing harmonics that "feed" off of existing frequencies, no
matter how faint.
- Multi-Band Digital
Compression/Limiting: In short, we can smooth out audio
levels not just globally, but in selected frequencies and
bandwidths. Our high-end software allows us to narrow down
frequencies with incredible precision.
want to emphasize that recorded music
can only be restored or improved to a point, simply because an audio
recording cannot be deconstructed to isolate individual instruments.
analogy to explain this is paint. Once you mix several colors of
together, you can't un-mix them. Once you mix eggs, milk, and
butter together, you can't un-mix them. The same is true for
recorded audio. Once you mix instruments, vocals, and even
together, you can't un-mix them.
Restoration software isolates and processes the frequency
ranges where specific instruments or noises are found in the audio
spectrum. For example, if an accordion is too shrill on a
recording, we'll find the frequency range where the shrillness exists
and subdue it as needed. It is impossible, however, to
physically isolate the accordion from the rest of the instruments and
its level or tone without affecting the other instruments in its
With our high-quality mastering software and years of engineering
significant improvements to a recording may be possible, but
limitations do exist. If instruments or vocals need to be
individually processed or adjusted,
then remixing the music
from the studio multi-track recording would be required. If
you're not sure to what extent your project can be restored, please contact us
for a free consultation.