[Vintage-Audio] Cassette Audio Quirk?

[Duane Fischer, W8DBF]

Hello Steve,

Not likely. Remember, everything works 'other' then a cassette. No problems 
remastering from vinyl etc.

Thank you for the thoughts just the same. Whatever this is, it is related to 
the cassette, perhaps unique to it.

----- Original Message ----- 
From: "Steve Byan" <stevebyan at comcast.net>
To: "Vintage home and professional audio equipment from 1975 back" 
<vintage-audio at mailman.qth.net>
Sent: Tuesday, June 02, 2009 9:10 AM
Subject: Re: [Vintage-Audio] Cassette Audio Quirk?


>
> On Jun 1, 2009, at 6:22 PM, Duane Fischer, W8DBF wrote:
>
>> I keep encountering a problem every time that I remaster the audio
>> on a
>> cassette tape to a CD format.
>>
>> Yes, for those of you who may remember this, I have also recorded the
>> cassette audio to my Sony DAT deck and converted the mono on the
>> cassette to
>> stereo on the DAT.
>>
>> The Master DAT is perfect, at least to my finely tuned ears.
>> However, when I
>> feed the DAT to the Sony CDRW deck to create a CD, things go a bit
>> crazy.
>>
>> The CDRW apparently hears a snap or a crackle or a pop or ...? When
>> it hears
>> this noise, not audible to me, it causes distortion in the CD
>> recording.
>>
>> I have changed all input/output cables from the amplifier to the
>> DAT, from
>> the DAT to the amplifier, from the CDRW to the amp etc. All are the
>> Gold
>> plated heavy audio cables six feet in length.
>>
>> I have tripled checked the Yamaha cassette deck and all of the other
>> hardware that is involved.
>>
>> I can not find anything wrong with anything.
>>
>> This only happens when I am trying to convert an audio cassette to
>> CD, makes
>> no difference if the cassette is in mono or stereo or identical mono
>> on both
>> stereo tracks.
>>
>> Have any of you encountered any issue like this one involving a
>> cassette
>> tape?
>
> I've no experience with that kind of gear, but from a theoretical
> perspective it's possible that the 48 KHz sample rate noise from the
> DAT deck is being aliased down to a 3.9 kHz tone by the 44.1 kHz
> sampling rate in the CDRW deck. There are anti-aliasing filters in
> both the DAT output and the CDRW input, but it's possible that enough
> signal is leaking through to screw things up. What happens if you just
> go from the cassette to the CDRW deck and omit the DAT deck?
>
> Best regards,
> -Steve
>
> --
> Steve Byan
> stevebyan at comcast.net
> Littleton, MA
>
>
>
>
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