[request] Separately adjustable out levels

now you can only set the Master Level in the "Other" screen. Would be good if each output could be adjusted separately.

I adjust the outputs of my main mix AND outputs 1 2 3 4 with the mixer.
The master output dB attenuation is for impedance matching voltages to other gear really, so just make sure it is not clipping and then leave it set that way. Use that as a relative level for other outputs as well when you do a multi track out for a reference volume.

If I set the master output level to 0db or even -12db I then have to set the track output to under 15, otherwise it's too much for the Digtech Stereo Jamman looper.

I'm think of making two audio cables with built in resistors to get the sound level maybe 20-30db lower, not sure what value resistor to use tho.

That idea of resistor is called padding. It is not a case of just adding resistor.
It also deoends on balanced or unbalanced as well. So look at something called padding. Usually you need two resistors and a cap, this is soldered in a certain way. Do not under any circumstances just add resistors, other wise you will damage something.
You are right though this can help. OR just set the input gain of the looper if you can. IF not then yeah padded line or drop the dB in master.
Really to do it properly you need this math here....
http://en.wikipedia.org/wiki/Attenuator_(electronics)
cos it is about the maths sorry, no other way to do it. So say 3dB less should be half the voltage. least there is something there that should see you right.

afaik the outs on the mpc are unbalanced

I was also thinking of using a headphone volume adjuster, I think it is simply a variable resistor.

ML2 JamMan Stereo Looper and Phrase Sampler Guitar Effects Pedal Specifications:

Digital
A/D/A Converters: 24-bit audio
Sampling Frequency: 44.1kHz
USB
Type: USB 1.1 Full Speed, supports USB 2.0
Protocol: Mass Storage
Connector: Type B
* Inputs/Outputs
Instrument/Guitar Input: 1/4" Unbalanced (Tip-Sleeve)
Input Impedance: 1 mOhms
Maximum Input Level: 11dBu
* Microphone Input: XLR Balanced (Female XLR, pin 2 Hot), not
powered
Input Impedance: 600 Ohms balanced
Maximum Input Level: -7.5 dBu
* Auxiliary Input: 1/8" Stereo (Tip-Ring-Sleeve), sums to mono
Input Impedance: 20kOhms
Maximum Input Level: 0dBu
Footswitch: 1/4" jack (Tip-Ring-Sleeve)
compatible with optional FS3X
Line/Headphone Output: 1/4" Mono (Tip-Ring-Sleeve)
Stereo headphone compatible with 50 ohms
minimum impedance, driven by mono signal
Output Impedance: 100 ohms
Maximum Output Level: 10dBu
Power
US and Canada: 120 VAC, 60Hz Adapter: PS0913B - 120
Japan: 100 VAC, 50/60 Hz Adapter: PS0913B - 100
Europe: 230 VAC, 50Hz Adapter: PS0913B - 230
UK: 240 VAC, 50Hz Adapter: PS0913B - 240
Power Input: 9 VAC 1.3 A
Power Consumption: 7 watts
General
Dimensions: 6.7"W x 5.6"D x 2.6"H
Weight: 2.88 lb.

TYPO wrote:* Auxiliary Input: 1/8" Stereo (Tip-Ring-Sleeve), sums to mono
Input Impedance: 20kOhms
Maximum Input Level: 0dBu

Depending on what input you are using of course, but this is the one to calculate to. It is usually calculated at 1 kHz. This is because the impedance changes over frequency, so do calculation at 1 kHz for this kinda thing.
Aux outs of MPC 1-4 is quoted here
1/4-inch phone x 4 unbalanced +11dBu, output impedance 1k Ohms,
Max. output level +17dBu
That is what you need to calculate it. Which you do yourself of course, as you do not expect me to do it for you do you

here is an online calculator

I will prolly make 2 T-Pad attenuators.