Rick R
Veteran
I have read about the 'helicopter sound' artifact, however neither myself nor my contact at Tascam can replicate it.
FWIW, in some other devices ( personally, a HHB PortaDAT and SD302) that exhibited the 'helicopter sound' it was the result of infrasonic LF sounoverloading the input stage.. and inserting a hi-pass filter was the cure. However on budget devices, the HPF is after the fact.. ie; digital. So an external filter would be wanted, on the mic or in-line.
FWIW, in some other devices ( personally, a HHB PortaDAT and SD302) that exhibited the 'helicopter sound' it was the result of infrasonic LF sounoverloading the input stage.. and inserting a hi-pass filter was the cure. However on budget devices, the HPF is after the fact.. ie; digital. So an external filter would be wanted, on the mic or in-line.