I have used both Alkaline, Ni-hm and even uSB bus power to power the recorder, and the only options to change are for the Phantom Power 24V or 48V, both of which does not relate to this matter.
However that is a good shout in regards what the Dr-40 will accept, I was only using a metal steroe 1/4" to 1/8" adapter from the mono output of the power supply/inline adapter: http://www.bhphotovideo.com/images/images2000x2000/sennheiser_549346_universal_1_8_to_1_4_912789.jpg
Do you reckon if I got a wired Male XLR to female 3.5mm jack would suffice like the Rode adapter that you suggested???
Are you using rechargeable or alkaline batteries? There is a setting in the menu to select either 1.2 or 1.5 volts... not sure if this will provide a fix but it is one more thing you can try and eliminate as a potential cause.
I also think I read somewhere that unless the 1/4" input is balanced the DR40 will ignore it (was never able to get mine to work either). Here is a more descriptive thread on DR40's balanced requirement - http://www.dvxuser.com/V6/showthread.php?317632-Tascam-Dr-40-recorder-cable-and-connections-confusion-to-record-from-mixer-outputs!
You could also try this Rode XLR adapter and bypass the 1/4" input http://www.sweetwater.com/store/detail/VXLR?adpos=1o1&creative=54989267161&device=c&matchtype=&network=g&gclid=CL3e38KhncwCFYNkhgodVOQFUw
They're readily available at music stores... bring that DR40 into the store and test it out.
The definitive solution would be to buy an XLR lav mic. http://www.amazon.com/Movo-LV4-C-Lavalier-Microphone-Windscreen/dp/B00X87FAOI/ref=sr_1_1?s=musical-instruments&ie=UTF8&qid=1461158104&sr=1-1&keywords=xlr+lavalier
I have set it toMIC and still not pick up anything!
Could it be the fact that im using a stereo 1/4" adapter on a mono 1/8" output?
Would an XLR to 3.5mm female make any difference?? :(
Recorder should be set to MIC not LINE, correct? Make sure phantom power is off.
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