[Rwp] Accessible spectrum analyser
Chris Belle
cb1963 at sbcglobal.net
Sun Mar 6 08:47:37 EST 2016
And thank you again for your finework.
On 3/5/2016 4:19 AM, Fiore Martin wrote:
> Ok I eventually saw the typo and corrected it. Thanks for flagging that!
>
> all the best
> Fiore
>
>
>
> 2016-03-03 18:03 GMT+00:00 Chris Belle <cb1963 at sbcglobal.net
> <mailto:cb1963 at sbcglobal.net>>:
>
> Where you said the very right you put a left in there.
> Just a small thing.
> I think you meant to say right because high frequencies are on the
> right.
> Anyway, thanks for your hard work, and who knows, maybe snow man
> will get creative and do something with it.
> 'grin'.
>
>
> On 3/3/2016 4:00 AM, Fiore Martin wrote:
>
> Hi everybody,
>
> Chris:
> it is exactly as you said: the higher the frequency the
> further to the right it is, and lower the frequency it goes to
> the left.
> Where did you spot the mistake ? In the webpage of the
> analyser I am saying that :
> the sonification is *panned from left to right* and the
> panning represents *the position of the peaking frequency* in
> the whole spectrum, ranging from 20 Hz on the very left, to
> 20050 Hz on the very right. For example, if the selected
> spectrum peaks at 50 Hz then you'll hear the beep towards the
> left, whereas if the peak is at 20 kHz the beep will occur
> towards the left.
> Maybe not the clearest way to put it but I think here we were
> on the same page.
>
>
> Also : it's not possible to have the sonification going
> through a different sound card than the sound being analysed.
> However you might find useful to play with the separate wet
> and dry parameters to go some way into that.
>
> Hopes this is helpful.
>
> Thank you for your feedback.
> This project is now terminated so I am officially no longer
> working on this any more.
> I know that for those of you who are not programmers it
> doesn't make much difference but we released the source code
> as well.
> It's linked from the web page of the plug-in
>
> all the best
> Fiore
>
>
>
>
> 2016-03-03 8:08 GMT+00:00 Chris Belle <cb1963 at sbcglobal.net
> <mailto:cb1963 at sbcglobal.net> <mailto:cb1963 at sbcglobal.net
> <mailto:cb1963 at sbcglobal.net>>>:
>
>
> Well, the last point could be done by a time selection in
> your daw,
> and the table set to generate till the daw stops or
> something like
> that.
> Like a timed run of a specific portion.
> leave it to your brilliant mind to analyze and break all
> this down
> I like that table thing,
> and being able to change the resolution of what is
> analyzed would
> be great.
> I'm going to persevere with the current implementation and see
> what I can do with it.
> This is the first tool of it's kind I believe,
> we've had audio meters in hardware before, but it's nice
> now that
> the software ones are finally coming around to reality
> instead of
> just concept.
> I'm not a programmer, but in theory it shouldn't be hard
> to generate
> some kind of values which can be tied to text out-put,
> we'll never have it s good as being able to look at a
> graph, but it
> should be possible to link up something useful can you
> imagine as
> a programming guy how this might be done?
> YOu and this fellow would make a formidable programming
> team I bet.
> 'grin'.
>
>
>
>
> On 3/2/2016 2:20 PM, Snowman wrote:
>
> Well, here are my thoughts about this, for what it's
> worth.
> I find myself less able to make use of a real-time,
> dynamic
> audible output like this, especially while I'm also
> hearing
> the audio itself. But, also in general.
> To be honest, I wish this tool could generate a spectrum
> report, which would be a table of numbers describing
> a curve,
> showing how much peak, and average energy is in each
> frequency
> band, so you could study it, and learn where the peaks
> really
> reside.
> A constantly changing tone output has time delays
> associated
> with it, as you are aanalyzing the selection in real
> time. So, yeah, it takes a bit of concentration,
> especially for a
> partially tone deaf person, like me. I know, Not a
> musician
> any more. But, I still do audio production.
> If the tool would let me specify a bin size, maybe in
> hertz,
> or in octives, and the start and end frequencies of the
> spectrum I want to check out, much as it does now,
> except for
> the addition of the bin size. And then, produce a
> table of
> amplitudes, which generally show how much energy is in
> each
> bin, then I could understand what is actually going on.
> As it is, you have to violate the threshold before you
> get any
> indication that some coloration still exists.
> So, for example, I would specify start frequency, then
> width,
> or end frequency, and then bin size.
> So, Maybe I watch the area between 1k and 11khz, for a 10K
> total span, and I specify 100 hz bin size. so we
> divide the
> 10k span by the 0.1khz bin size, and then we generate 100
> values. The first value represents the amount of
> energy in
> the span from 1k to 1.1khz. By inspecting that table,
> manually, or witt computerized aid, I can find out
> which bin
> has the most energy, even if it did not violate any
> threshold. From that, I can rather precisely tell
> where I am
> sharp.
>
> The last thin is to somehow identify the portion of a
> track,
> or file, that should be analyzed.
>
> Anyway, that is what I hope for. More of a static
> analysis
> tool, instead of a real-time dynamic tool.
>
> I don't claim that the current implementation doesn't have
> value. I think it does. I just wish for this additional
> static data output.
>
> ----- Original Message ----- From: "Chris Belle"
> <cb1963 at sbcglobal.net <mailto:cb1963 at sbcglobal.net>
> <mailto:cb1963 at sbcglobal.net <mailto:cb1963 at sbcglobal.net>>>
> To: "Reapers Without Peepers" <rwp at bluegrasspals.com
> <mailto:rwp at bluegrasspals.com>
> <mailto:rwp at bluegrasspals.com
> <mailto:rwp at bluegrasspals.com>>>
>
> Sent: Wednesday, March 02, 2016 7:28 AM
> Subject: Re: [Rwp] Accessible spectrum analyser
>
>
> I think there's some slight errors in the
> documentation,
> you said left when you meant right,
> or maybe I don't understand correctly, but
> the way I grasp it is that the tone goes up in
> pitch as
> the volume of the peak goes up, and the position
> of the
> sound in the
> pan field changes with frequency, the higher the
> frequency
> the further to the right it is, and lower the
> frequency it
> goes to the left.
> Is that right?
>
> And you can select the starting point, and the
> band width
> of the frequency range that is being tested.
> I'm curious,
> can the beeps be separated from the sound of the audio
> your testing?
> Right now the audio jumps around in the pan field
> as well,
> and that is rather disconcerting if you are trying to
> listen to it,
> and find a hot frequency spot as well as hearing
> the beeps.
> So if it's possible to unlink the audio and the
> beeps it
> might be easier to work with.
> Just a thought, it may not bother others.
> Thanks for working so hard on this.
>
>
> On 3/2/2016 6:40 AM, Fiore Martin wrote:
>
>
>
> 2016-03-02 10:49 GMT+00:00 Chris Belle
> <cb1963 at sbcglobal.net
> <mailto:cb1963 at sbcglobal.net> <mailto:cb1963 at sbcglobal.net
> <mailto:cb1963 at sbcglobal.net>>
> <mailto:cb1963 at sbcglobal.net
> <mailto:cb1963 at sbcglobal.net>
>
> <mailto:cb1963 at sbcglobal.net
> <mailto:cb1963 at sbcglobal.net>>>>:
>
> Hey this is wonderful.
>
>
> Thanks!
>
> You're the guy who also developed the
> accessible
> peak meter thing
> too right?
>
>
> That's right. In fact the spectrum analyser
> came from
> the idea of using the accessible peak meter's very
> sonification into the frequency domain.
>
>
> If you guys haven't gotten that tool, it's
> really
> useful as well.
>
>
> On 3/1/2016 9:44 AM, Fiore Martin wrote:
>
> Hi all,
> just to let you know the Accessible
> Spectrum
> Analyser VST/AU
> plug-in is now available online for
> free at
> http://depic.eecs.qmul.ac.uk/apm/spectrum.html
>
> Accessible Spectrum Analyser makes
> spectrograms accessible
> using non speech sound to supports core
> activities in audio
> production.
> The plug-in was developed as part of our
> research on
> accessibility and cross modal
> collaboration at
> Centre for
> Digital Music, Queen Mary University
> of London.
>
> More info on the web page linked above
>
> thank you
> all the best
> Fiore Martin
>
>
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