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On Thu, Feb 14, 2013 at 8:14 AM, Fons Adriaensen wrote:
> On Thu, Feb 14, 2013 at 01:40:23PM +0100, Brendan Jones wrote:

quoted text
>

> > Just personal preference, but I think both of these have an

> > unacceptable amount of hissing that is not present in the original.

>

> The original had most of the signal above 2kHz or so almost gone, so

> this had to be boosted. Tape hiss gets amplified in the same way (this

> was a _casette_ recording). It's probably possible to remove some of

> the hiss using an FFT-based multiband expander.

>

>

Which is pretty much exactly what I did.  I used WaveARTs MRNoise for this

purpose, I have access to Izotope RX2 as well, but given that the signal

there is so weak, I didn't use that in a destructive manner, and I am

finding I prefer wavearts for primarily high frequency noise.  However

since RX2 is a new acquisition for me I am still learning their strengths

and weaknesses.

> > Can you explain what you did exactly

quoted text
>

> Second order shelf filter, +12 dB or so at 4 kHz and above. There were

> some faint traces of signal around 8 kHz, so a very narrow band around

> that frequency was boosted a few dB more.

>

>

Heh it is very interesting to hear you describe it, as I didn't look at the

signal analysis at all when I did mine, but also put in a fairly sharp

lowpass filter at 12k as I didn't hear anything usable above that when I

boosted.  Now I am curious to go back and try out what you describe as well

as look at the statistical analysis and see if it can be improved a bit

more or not, I just don't have time these days sadly.  This was a quick 15

minute project or so to see what I could do out of my own curiosity while I

had some spare time before a meeting.

       Seablade
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On Thu, Feb 14, 2013 at 8:14 AM, Fons Adriaensen =

<fons@linuxaudi=

o.org> wrote:

On Thu, Feb 14, 2013 at 01=

:40:23PM +0100, Brendan Jones wrote:
> Just personal preference, but I think both of these have an

quoted text
> unacceptable amount of hissing that is not present in the original.

The original had most of the signal above 2kHz or so almost gone, so<=

br>

this had to be boosted. Tape hiss gets amplified in the same way (this

was a _casette_ recording). It's probably possible to remove some of

the hiss using an FFT-based multiband expander.

Which is prett=

y much exactly what I did.=A0 I used WaveARTs MRNoise for this purpose, I h=

ave access to Izotope RX2 as well, but given that the signal there is so we=

ak, I didn't use that in a destructive manner, and I am finding I prefe=

r wavearts for primarily high frequency noise.=A0 However since RX2 is a ne=

w acquisition for me I am still learning their strengths and weaknesses.

=A0

quoted text
> Can you explain what you did exactly

Second order shelf filter, +12 dB or so at 4 kHz and above. There wer=

e

some faint traces of signal around 8 kHz, so a very narrow band around

that frequency was boosted a few dB more.

Heh it =

is very interesting to hear you describe it, as I didn't look at the si=

gnal analysis at all when I did mine, but also put in a fairly sharp lowpas=

s filter at 12k as I didn't hear anything usable above that when I boos=

ted.=A0 Now I am curious to go back and try out what you describe as well a=

s look at the statistical analysis and see if it can be improved a bit more=

 or not, I just don't have time these days sadly.=A0 This was a quick 1=

5 minute project or so to see what I could do out of my own curiosity while=

 I had some spare time before a meeting.

=A0=A0=A0=A0=A0=A0 Seablade=
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