On Performing Mathematical Operations with Omnidirectional Microphones

At your own risk. Vibration on one microphone membrane may induce vibration on another, although it will normally be small.


Can many musical parts be recorded at the best possible quality without the use of a mixing (signal adding) console?


Hybrid transformers may be used but why not creating a even simpler signal path for pristine recording quality.


A suitable microphone is the Beyer M55 moving coil omnidirectional. It sounds correct to mind perception at almost any distance and angle without EQ.


Two microphones of 500ohms connected in series (pin 2 signal live, pin 3 of one mic to pin 2 of the other, pin 3 signal return) should combine (add) signals perfectly and the resultant is a mic of 1000ohms output impedance.


Similarly 2 mics in parallel (pins: 2 to 2, 3 to 3) create a combined signal source of 250ohms.


The advantage is that each instrument or vocal performer or group feeds on each (or more) microphone.


And this can be as close as needed for fullness of sound and excellent signal to noise ratio even when recording outdoors.


The mic distance adjusts volume.


The combination of impedance adjusts -3 dB point cutoff frequency.


For example a 250ohm combination will sound more bassy than 1000ohms as this will feed the inductance of the input transformer creating an LR filter.


If amplification is needed then a Pleiades V4 low noise electron tube battery preamplifier may be connected. But this is possibly not needed.


Since each mic signal is added and assuming that one or more performers are playing the signal may be already strong and a preamplifier may not be needed. Pleiades filters or EQ may not be needed if the correct microphones are used at the right position.


And if performers are playing softly without antagonism the resultant signal may be full, loud and correct, ready for an analog to digital converter or analog tape recording.


A set of microphones may be shown to make a mathematical group.


And the use of this can possibly make the simplest signal path for recording music that sounds correct too from the brain of the performer to the brain of the listener.


Example signal path:


Some M55 mics in parallel series combinations - Sony TC-D5 Pro II XLR mic in left channel.


Some M55 mics in parallel series combinations - Sony TC-D5 Pro II XLR mic in right channel


Alternatively:


Each mic can be connected to an input transformer to a Pleiades V4 and all anode outputs resistor summed to feed another V4. This is more complex and should not be needed unless perhaps the smallest detail nuances need be recorded.


If the recording space is big as for example the 30th street Columbia converted church in New York, of infinite if recording outdoors the sound pressure levels at the ears of the performers should be small aiding them to intonate correctly.


Echo chamber may be added.


Is this the simplest multi mic recording signal path? How would it sound like?