At 17:59 01-05-13, Sampo Syreeni wrote:
On 2013-05-01, David Pickett wrote:
You say that, but I have recently been transferring old cassettes to
hard drive and, given that they have a limited bandwidth of about
15kHz, the noise is not intrusive and I have been amazed at the
quality -- a qual
On 01/05/2013 23:52, Sampo Syreeni wrote:
...
Still, do give me your definition of time-invariant. Perhaps there are
stronger definitions I haven't heard of yet, and which can be useful in
e.g. more fine grained analysis.
I have always understood it to mean that the behaviour is not depe
On 2013-05-01, Fons Adriaensen wrote:
While I do agree in principle, the 'quality' you appreciate may have
more to do with the content or production than with the storage
medium.
Now that we went off-topic already, I'll have to remind y'all about
DSD/SACD. Personally I think it has this prec
On 2013-05-01, David Pickett wrote:
You say that, but I have recently been transferring old cassettes to
hard drive and, given that they have a limited bandwidth of about
15kHz, the noise is not intrusive and I have been amazed at the
quality -- a quality that mp3 files do not approach.
I ha
On 2013-05-01, Fons Adriaensen wrote:
As a technical nitpick, they are too: if you just shift a signal in
time, the output will be a shifted version of the original.
That corresponds to a very weak definition of 'time-invariant'...
I didn't think there could be but one: either it varies in t
On Thu, May 02, 2013 at 01:28:40AM +0300, Sampo Syreeni wrote:
> In this vein the starting point prolly would be the Moog ladder, in
> its nonlinear region. It's hideously complex for such a charming
> little thing.
It's a real gem of analog design. But at least in this case
the dependene on the
On Wed, May 01, 2013 at 05:24:50PM -0500, David Pickett wrote:
> You say that, but I have recently been transferring old cassettes to
> hard drive and, given that they have a limited bandwidth of about
> 15kHz, the noise is not intrusive and I have been amazed at the
> quality -- a quality that m
On 2013-05-01, Fons Adriaensen wrote:
The diode is not 'perfect', it will have some voltage drop depending
on the current flowing in it. The result may well be 'desirable', i.e.
in practice better than what would be obtained by using a 'perfect'
diode.
Perhaps the nastiest commonly used exam
At 16:47 01-05-13, Sampo Syreeni wrote:
On 2013-05-01, David Pickett wrote:
So, analog still rules!
Please die horribly. ;)
You say that, but I have recently been transferring old cassettes to
hard drive and, given that they have a limited bandwidth of about
15kHz, the noise is not intrus
On Thu, May 02, 2013 at 12:46:36AM +0300, Sampo Syreeni wrote:
> As a technical nitpick, they are too: if you just shift a signal in
> time, the output will be a shifted version of the original.
That corresponds to a very weak definition of 'time-invariant'...
Ciao,
--
FA
A world of exhausti
On Wed, May 01, 2013 at 04:29:46PM -0500, David Pickett wrote:
> At 16:02 01-05-13, Fons Adriaensen wrote:
>
> >The difficult part in writing any software emulation of the Dolby-A
> >or similar systems is modelling the dynamic behaviour of the compander,
> >not the actual audio processing. Such sy
On 2013-05-01, David Pickett wrote:
So, analog still rules!
Please die horribly. ;)
--
Sampo Syreeni, aka decoy - de...@iki.fi, http://decoy.iki.fi/front
+358-50-5756111, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2
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On 2013-05-01, Fons Adriaensen wrote:
The point is that companders such as Dolby-A and Telcom are linear at
least over a short time span - they do not introduce distortion.
I started thinking about that as well. Yeah, if you put in all possible
spectra, in all combinations, at all speeds of c
At 16:02 01-05-13, Fons Adriaensen wrote:
>The difficult part in writing any software emulation of the Dolby-A
>or similar systems is modelling the dynamic behaviour of the compander,
>not the actual audio processing. Such systems will have 'designed' and
>documented attack/release times, but ana
On Wed, May 01, 2013 at 08:02:20PM +0300, Sampo Syreeni wrote:
> On 2013-05-01, Dave Hunt wrote:
>
> >Dolby A (etc.) decode. Would it not be possible to to do this with
> >convolution ?? Find a working unit, record its impulse response,
> >use that in one of the many convolution reverb/filter plug
On 2013-05-01, Dave Hunt wrote:
Dolby A (etc.) decode. Would it not be possible to to do this with
convolution ?? Find a working unit, record its impulse response, use
that in one of the many convolution reverb/filter plug-ins.
Unfortunately this is not an option. Convolution can be used to m
Hi,
Dolby A (etc.) decode. Would it not be possible to to do this with
convolution ?? Find a working unit, record its impulse response, use
that in one of the many convolution reverb/filter plug-ins. While
doing that record the encode impulse response for those who want to
use it as an ef
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