[iyonix-support] Re: Audio In cycling volume

On 11 Mar 2008, Andrew wrote:
> The latest attempt: high volume on the tape player, microphone socket
> input on full and gain on AudioIn just over half way. Seems ideal
> apart from the unavoidable background hiss - is there anyway to clear
> that up using SampleEd?
> 

I'm afraid your best bet is to process the file on another platform, 
where signal processing programs are more readily available, are far 
more powerful, and moreover are far faster.

But I also think that you may not be getting the highest possible 
signal to noise ratio out of the Iyonix audio input. I think the audio 
input on the Iyonix gives best signal to noise ratio when it is fed 
with up to 1 or 2v: CD output levels.

You say you have the tape player on full volume.  (??) Does this mean 
that you are coming out of the headphone jack, or tapping off the 
loudspeaker output? The volume control does not usually affect the 
line output level from a tape player.

Have you got a pre-amp? If so, feed the line output from the tape 
player into the pre-amp. Use another lead, this time coming from the 
pre-amps' output that usually goes into the power amps input. This 
WILL be affected by the pre-amps volume control, but it will also have 
the potential to give more output voltage for going into the Iyonix 
audio input. It still wont usually be CD output level, but it could be 
up to 15dB higher than from the tape players line out.

Whether this improves upon the hiss you mention depends a lot on 
whether the hiss is predominantly tape-hiss, or whether it is 
pre-eminently Iyonix input hiss, or both.

Another question - is this track irreplaceably unique, or have other 
people got one? If the latter, then why spend so much effort trying to 
rescue a poor recording of it? Have I got one?

-- 

Cheers
Roger

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