Volume Seems to Decrease and then Recover

[sgreiner1011]

Hi All,

Right now I am using a Japanese Hara M-180 to cut 45RPM PVC with a diamond I got from MyShank. I have been having some really great success, but on some songs the volume dips a bit and then recovers. I can hear it in the head while testing before cutting. When I am finished cutting, I can also hear it on the record itself. The lathe states that frequency range is 50Hz to 8000Hz with +-3dB. I am using Audacity to record MP3 on PVC. Audacity has an iRIAA curve I can use, but I never get any bass when using that inverse curve so I stopped. Like I said, some songs come out sounding great, but others the volume dips and then recovers.

I tried the high and low pass filters that Audacity has (using the above frequency range among others), but that doesn't seem to do anything. I have tried to lower the gain, lower the bass and treble, lower the recording volume, and lower the frequencies on or near 50Hz and 8000Hz using the Audacity equalizer. Nothing seems to work.

Could it be something to do with the actual frequency response of the head or something? Has anybody ever come across this problem?

Thanks

[sgreiner1011]

I found out why... It was because the recordings I got were recorded with outrageous gain. Had to lower the gain more than usual and the volume as well. Had to also split stereo into two monos and play them both out of one channel.

I love this little Hara M-180 lathe. It records very nicely if the digital recordings are mastered correctly.

[boryo]

Great that you found what was causing this issue! Can you post samples of the recordings that you made with this machine? I mean, recorded from the record itself if possible...

Best,
Bob

[sgreiner1011]

Yes, I suppose I could. Give me some time yet. Thanks

[sgreiner1011]

Sorry, but the artist does not want me to post it until its copyrighted.

Now Im having other issues. Ill post it in another thread.