Dry/Wet blend help needed!

[carboncomp]

Hey guys, wanted to slap a little Dry/Wet blend circuit into some pedals for a friend who plays bass, seem like the FET transistor based version of the MINIMAL BLENDER will do the job!

http://www.seanm.ca/stomp/minblend.html

Just wanted to check that as this is going into a pedal rather then a box on its own, how to wire up the send/return/in and out.

[amptramp]

The wet and dry appear across a 50K pot.  If you are going into a high-impedance input in the next stage, you will get very little variability of the blend effect.  If you are going into a 50K load, you can get a voltage multiplication factor of 1.0 for the slider at one end of a pot and 0.5 for the other, which may or may not be what you want, but it will be noticeable.  But if you are going into a 1M input, you will vary the factor from 1.0 to 0.95238 for the full sweep of the slider which will not have much effect.  As a general rule, NEVER put controls at the input or output where variations in input or output impedance can cause all sorts of different things to happen.  This design needs an output buffer and an input buffer for the external input.  Then you have complete control of the impedances and the device will sound the same at each position of the blend control in any system that uses high input and low output impedances for the affected pedals.

[carboncomp]

So is this a buffered version using two op amps to ovoid posable impedances problems?  
http://seanm.ca/stomp/bblender.html

[amptramp]

Correct, the blend pot is now isolated from all external influences.  The low output impedance of each input buffer acts as a virtual ground for the signal coming from the opposite end of the pot, so you get a full range of control.

[carboncomp]

Thank you so much for taking the time to explain that to me, sincerely appreciated!

Now I better go and read up more on buffers and impedance! 

[DavenPaget]

So is this a buffered version using two op amps to ovoid posable impedances problems?  
http://seanm.ca/stomp/bblender.html

Wondering what's the power consumption on that , might make sense to use a TC1044SCPA/LT1054CP or the LT1054CDW for the SMD equipped people .