Something I found that I've been using every day since.
Kick Drum
Any apparent muddiness can be rolled off around 300Hz. Try a small boost around 5-7kHz to add some high end.
Frequency Effect
50-100Hz Adds bottom to the sound
100-250Hz Adds roundness
250-800Hz Muddiness Area
5-8kHz Adds high end presence
8-12kHz Adds Hiss
Snare
Try a small boost around 60-120Hz if the sound is a little too wimpy. Try boosting around 6kHz for that 'snappy' sound.
Frequency Effect
100-250Hz Fills out the sound
6-8kHz Adds presence
Hi hats or cymbals
Any apparent muddiness can be rolled off around 300Hz. To add some brightness try a small boost around 3kHz.
Frequency Effect
250-800Hz Muddiness area
1-6kHz Adds presence
6-8kHz Adds clarity
8-12kHz Adds brightness
Bass
Try boosting around 60Hz to add more body. Any apparent muddiness can be rolled off around 300Hz. If more presence is needed, boost around 6kHz
Frequency Effect
50-100Hz Adds bottom end
100-250Hz Adds roundness
250-800Hz Muddiness Area
800-1kHz Adds beef to small speakers
1-6kHz Adds presence
6-8kHz Adds high-end presence
8-12kHz Adds hiss
Vocals
This is a difficult one, as it depends on the mic used to record the vocal. Apply either cut or boost around 300hz, depending on the mic and song.
Apply a very small boost around 6kHz to add some clarity.
Frequency Effect
100-250Hz Adds 'up-frontness'
250-800Hz Muddiness area
1-6kHz Adds presence
6-8kHz Adds sibilance and clarity
8-12kHz Adds brightness
Piano
Any apparent muddiness can be rolled off around 300Hz. Apply a very small boost around 6kHz to add some clarity.
Frequency Effect
50-100Hz Adds bottom
100-250Hz Adds roundness
250-1kHz Muddiness area
1-6kHz Adds presence
6-8Khz Adds clarity
8-12kHz Adds hiss
Electric guitar
Again this depends on the mix and the recording. Apply either cut or boost around 300hz, depending on the song and sound. Try boosting around 3kHz to add some edge to the sound, or cut to add some transparency. Try boosting around 6kHz to add presence. Try boosting around 10kHz to add brightness
Frequency Effect
100-250Hz Adds body
250-800Hz Muddiness area
1-6Khz Cuts through the mix
6-8kHz Adds clarity
8=12kHz Adds hiss
Acoustic guitar
Any apparent muddiness can be rolled off between 100-300Hz. Apply small amounts of cut around 1-3kHz to push the image higher. Apply small amounts of boost around 5kHz to add some presence.
Frequency Effect
100-250Hz Adds body
6-8kHz Adds clarity
8-12kHz Adds brightness
Strings
These depend entirely on the mix and the sound used.
Frequency Effect
50-100Hz Adds bottom end
100-250Hz Adds body
250-800Hz Muddiness area
1-6hHz Sounds crunchy
6-8kHz Adds clarity
8-12kHz Adds brightness
Kick Drum
Any apparent muddiness can be rolled off around 300Hz. Try a small boost around 5-7kHz to add some high end.
Frequency Effect
50-100Hz Adds bottom to the sound
100-250Hz Adds roundness
250-800Hz Muddiness Area
5-8kHz Adds high end presence
8-12kHz Adds Hiss
Snare
Try a small boost around 60-120Hz if the sound is a little too wimpy. Try boosting around 6kHz for that 'snappy' sound.
Frequency Effect
100-250Hz Fills out the sound
6-8kHz Adds presence
Hi hats or cymbals
Any apparent muddiness can be rolled off around 300Hz. To add some brightness try a small boost around 3kHz.
Frequency Effect
250-800Hz Muddiness area
1-6kHz Adds presence
6-8kHz Adds clarity
8-12kHz Adds brightness
Bass
Try boosting around 60Hz to add more body. Any apparent muddiness can be rolled off around 300Hz. If more presence is needed, boost around 6kHz
Frequency Effect
50-100Hz Adds bottom end
100-250Hz Adds roundness
250-800Hz Muddiness Area
800-1kHz Adds beef to small speakers
1-6kHz Adds presence
6-8kHz Adds high-end presence
8-12kHz Adds hiss
Vocals
This is a difficult one, as it depends on the mic used to record the vocal. Apply either cut or boost around 300hz, depending on the mic and song.
Apply a very small boost around 6kHz to add some clarity.
Frequency Effect
100-250Hz Adds 'up-frontness'
250-800Hz Muddiness area
1-6kHz Adds presence
6-8kHz Adds sibilance and clarity
8-12kHz Adds brightness
Piano
Any apparent muddiness can be rolled off around 300Hz. Apply a very small boost around 6kHz to add some clarity.
Frequency Effect
50-100Hz Adds bottom
100-250Hz Adds roundness
250-1kHz Muddiness area
1-6kHz Adds presence
6-8Khz Adds clarity
8-12kHz Adds hiss
Electric guitar
Again this depends on the mix and the recording. Apply either cut or boost around 300hz, depending on the song and sound. Try boosting around 3kHz to add some edge to the sound, or cut to add some transparency. Try boosting around 6kHz to add presence. Try boosting around 10kHz to add brightness
Frequency Effect
100-250Hz Adds body
250-800Hz Muddiness area
1-6Khz Cuts through the mix
6-8kHz Adds clarity
8=12kHz Adds hiss
Acoustic guitar
Any apparent muddiness can be rolled off between 100-300Hz. Apply small amounts of cut around 1-3kHz to push the image higher. Apply small amounts of boost around 5kHz to add some presence.
Frequency Effect
100-250Hz Adds body
6-8kHz Adds clarity
8-12kHz Adds brightness
Strings
These depend entirely on the mix and the sound used.
Frequency Effect
50-100Hz Adds bottom end
100-250Hz Adds body
250-800Hz Muddiness area
1-6hHz Sounds crunchy
6-8kHz Adds clarity
8-12kHz Adds brightness