I’m having problems with audio dropping out on a few of the channels on my 488mkii. It’s the worst on channels 7 & 8, with 3 also being quiet and dipping in volume occasionally.
It seems to be during recording; upon playback the dropouts happen in the same spots every time. Also, flipping the tape over shows them happening on the corresponding/opposite channels. It isn’t an input issue, the meters all read perfectly and monitoring all sounds fine during recording, but when playing the tape back the dropouts happen.
I’ve tested this with 400hz tones from my phone on all the channels to get a constant level. I’ve switched between inputs, I’ve used all the buses, I’ve cleaned the entire tape path with 91% alcohol, it still happens.
I was never convinced that degaussing/demagnetizing wasn’t kind of a myth, but could that really be the issue? My understanding was that it’s supposed to cause bad high frequency response (which is why I used a lower frequency tone to test), and even then not total dropouts... I don’t know how to go about troubleshooting this any further, so any help would be greatly appreciated!
It seems to be during recording; upon playback the dropouts happen in the same spots every time. Also, flipping the tape over shows them happening on the corresponding/opposite channels. It isn’t an input issue, the meters all read perfectly and monitoring all sounds fine during recording, but when playing the tape back the dropouts happen.
I’ve tested this with 400hz tones from my phone on all the channels to get a constant level. I’ve switched between inputs, I’ve used all the buses, I’ve cleaned the entire tape path with 91% alcohol, it still happens.
I was never convinced that degaussing/demagnetizing wasn’t kind of a myth, but could that really be the issue? My understanding was that it’s supposed to cause bad high frequency response (which is why I used a lower frequency tone to test), and even then not total dropouts... I don’t know how to go about troubleshooting this any further, so any help would be greatly appreciated!
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