Yes, the tuner also works on audio tracks, or, to be more correct, on audio inputs, since a tuner is used before recording, and never on recorded material. Mainly because it is generally considered not smart to tune a guitar after the recording.
The tuner is designed to 'listen' to ONE steady(-ish) tone at a time.
I've used it with ease on a twelve string guitar (on an audio track/input). And I'm not even a guitar player.
That's right, the tuner cannot detect the "key" of an audio file; mainly because no such thing exists.
Audio files do not have "keys". Pieces of music can have keys, audio files can't. Samples in sampled instruments can have pitch information, but that's not the same as 'key'.
Lol, sorry with the newby jargon but let me try an explain what i need this for, If i am making a track, electronic dance music i need everything to be in key. So for chords if i create a chord progression in the key of Gb minor, i will want a baseline to be in key with that which im fine with doing.
The problem is if i drop in an audio file that has no pitch information and i want to use these audio files as stabs, blips ect i would like them to be in 'key' with the rest of the track, because harmony and all..
In Ableton you can open up Spectrum on an Audio/Instrument track, click on analyze and it will show you the frequencies within the file, just like if you do it in Logics EQ with analyzer on, the difference with Ableton's spectrum is you can highlight the fundamental frequency just with the cursor and it will give you the pitch, eg what note it is.
So if i find out what pitch an audio file is i can then detune it to say, Gb minor to suit the chord progression i mentioned. This is what i want to achieve
Another thing, whats the easiest way in Logic to change the pitch of an audio file? Pitch shifter doesnt seem to have an octave shifter, and doing it via the Sampler seems a bit complicated when you have lots of samples to retune.