I'm Marco from Italy, this is the first time that I write here, I hope to explain in my best way
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I'm trying to emboss some mastered track on blank, but the results aren't good.
I use a late machine from David project, the file audio come from a NAD preamplifer to the Audio Research D240.
The RIIA eq curve is applied to the audio in my DAW.
I tried to increase or decrease the angle of stylus (embossyng styl Presto) and tried to increase or decrease the weight, now is around the 40gr, but without any success.
Anytime that I try to increase the volume, the groove become irregular as the pics attached.
If I emboss the silent the groove is regular, without a strange frequencies; if I try to emboss the 1Khz test tone around the -20db, all is ok,
but if I try to emboss some audio file, mastered, added RIIA eq curve at -6db, as soon as I increase the volume, the groove become irregular.
Have you some suggestions? please.
Cheers from Italy,
Marco