surripere Posted August 29, 2005 Report Share Posted August 29, 2005 Hi everyone, this is my first post.I have just got a RH10 and it's been fine copying files from the PC. However, when I have used it to record from vinyl on my hi-fi I get a noticable buzzing noise through the hi-fi and on the recording. As soon as I unplug the line in lead from the MD the buzzing stops. The MD is fed from the amplifier 'rec out' to the 'line in' socket on the MD.I have tried plugging MZN707 into the same set up and it doesn't create the buzz and nor does MD deckAny help much appreciated as part of the rationale for getting the RH10 was to be able to record and upload vinyl. Quote Link to comment Share on other sites More sharing options...
greenmachine Posted August 29, 2005 Report Share Posted August 29, 2005 Don't use the external power supply when recording through analog inputs. Quote Link to comment Share on other sites More sharing options...
sebastianbf Posted August 29, 2005 Report Share Posted August 29, 2005 Maybe the buzz come from the vinyl reproduction. You should try to pull down the rec level in your himd recorder, because sometimes it causes noise. Quote Link to comment Share on other sites More sharing options...
Sparky191 Posted August 29, 2005 Report Share Posted August 29, 2005 Don't use the external power supply when recording through analog inputs.←News to me. I use the AC supply all the time when recording my cassettes and I don't get any buzz. Why would using the AC supply be a problem? Quote Link to comment Share on other sites More sharing options...
surripere Posted August 29, 2005 Author Report Share Posted August 29, 2005 Already tried unplugging the power supply. I thought you had to record with AC power plugged in with Hi MD.I don't think it's to do with the vinyl reproduction, the buzz kicks in though the speakers as soon as I plug in the line in (incidently there is a huge humm if I touch the line in lead against the steel frame of the RH 10). I don't get the same problem if the amplifier is on CD mode. Quote Link to comment Share on other sites More sharing options...
greenmachine Posted August 29, 2005 Report Share Posted August 29, 2005 News to me. I use the AC supply all the time when recording my cassettes and I don't get any buzz. Why would using the AC supply be a problem?←I don't know why, it's just an observation, especially noticable with the new switching power supplies and the microphone input. With the lower gain line-in it's usually way less annoying.Surripere, is your turntable grounded? Quote Link to comment Share on other sites More sharing options...
KrazyIvan Posted August 29, 2005 Report Share Posted August 29, 2005 Is your turntable properly grounded? Quote Link to comment Share on other sites More sharing options...
surripere Posted August 29, 2005 Author Report Share Posted August 29, 2005 yeah, turntable grounded on the back of the amplifier. Quote Link to comment Share on other sites More sharing options...
Sevkatia Posted August 29, 2005 Report Share Posted August 29, 2005 Another thing to check is if your turntable is plugged into a "phono" input vs. line input, since most (but not all) turntables have output signal level much less than needed for a "line in". Quote Link to comment Share on other sites More sharing options...
Meryl Arbing Posted August 30, 2005 Report Share Posted August 30, 2005 (edited) I don't generally record directly from my stereo to the MD although Sony does produce some bookcase units with (what they call) MD-Link that gives you an Optical In.Vinyl is too noisy (scratches, dust and dirt) so I record to my PC first and then run some Audio cleaning software (Audio Cleaning Lab 10 from Magix is cheap and effective) and remove the defects before sending it to MD. My old 1964 Beatles LPs came out remarkably good.However, when I connected my turntable/reciever directly to the soundcard of my PC there was a definite hum that wasn't a result of the sound card. Someone told me that the problem was a ground loop between my computer and the stereo.I got the In-Port from Xitel which is a USB Line in with RCA plugs but which also includes Ground Loop Isolator circuitry. No more hum.Xitel also sells a dedicated Ground Loop Isolator for a lot less than the fill In-Port unit.Xitel Ground Loop Isolator pdf Edited August 30, 2005 by Meryl Arbing Quote Link to comment Share on other sites More sharing options...
surripere Posted August 30, 2005 Author Report Share Posted August 30, 2005 Meryl, the ground loop isolator looks promising, thanks for the info Will feeback when I get hold of one Quote Link to comment Share on other sites More sharing options...
FlameGrilled Posted September 2, 2005 Report Share Posted September 2, 2005 If you suspect a ground loop prob (which it could easily be, in addition to maybe s/mode psu chatter.. which in itself is not exactly 'quiet' sometimes)...The cheap, non-techy, possible solution is an old standby..Use two diff power points, one for the source and one for the PSU powerng the MD unit.Might not totally solve it, but when i had to resort to that method once or twice when i had situations where adding to the in-line was not an option (aka at work, they kinda slapped you hard for unauthorised tampering), it got me out of trouble...We are talking, potentially (and in my case), the 'noise' level of the earth loop dropping down from an indicated (reference metering from reliable non-domestic equipment with proper metering) -60dB to around -80dB or better (in one instance, a hell of a lot better).Might be enough to get someone outa trouble, til they can improve the situation properly Quote Link to comment Share on other sites More sharing options...
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