Hallo, john saylor hat gesagt: // john saylor wrote:
let's say i have a .wav file, and i want to make it smaller. this is the list of options i am aware of:
- i can reduce the channels to 1 [mono]
- i can reduce the sample rate from 44100 Hz.
- i can reduce the bits per sample
in terms of minimizing fidelity loss, i would guess that the list would go like this [with the least loss leading]:
- channels
- rate
- bits
is this correct?
It depends. All three do very different things: 1 affects spatialization, 2 affects highest possible frequency, and 3 mostly affects dynamic range and signal/noise ratio.
So selection of a compression method depends on what you would miss most. The popular compression algorithms like mp3 or ogg automate this selection somehow. For example, they join stereo channels in those places, where there is not much difference between both channels, and they reduce bitrate dynamically according to the amount of information in a signal.
and what tools would i use to perform these manipulations? sox for all?
Any soundfile editor will do this. Sox is great for batched processing, but also take a look at editors like Snd, Rezound or Audacity.
ciao
Frank Barknecht _ ______footils.org__