Search found 1730 matches

by Robert J. H.
Sat Feb 16, 2013 4:45 pm
Forum: Audacity 2.x Feedback and Reviews
Topic: Possible noise issue in EQ A2.0.3
Replies: 19
Views: 4072

Re: Possible noise issue in EQ A2.0.3

How big is the amplitude of the modified silences (sorry, I can't see the graphics myself)? If the disturbance is rather tiny, I can offer the following explanation: The eq effect is built up with several Filters. They are most likely so called IIRs (infinite impulse response). As the name implies, ...
by Robert J. H.
Fri Feb 15, 2013 8:29 pm
Forum: Audacity 2.x Feedback and Reviews
Topic: Possible noise issue in EQ A2.0.3
Replies: 19
Views: 4072

Re: Possible noise issue in EQ A2.0.3

Maybe it is dithering noise, that's boossted?
by Robert J. H.
Fri Feb 15, 2013 8:08 pm
Forum: Audacity 2.x Feedback and Reviews
Topic: usefullness of envelope tool
Replies: 7
Views: 2777

Re: usefullness of envelope tool

I would take an graphics design tool approach to implement the linear functionality: You simply switch the line behaviour by a secondary click on the envelope point and so the line to the nearest point to the left will change into a linear one. A secondary click will reset it to a exponential charac...
by Robert J. H.
Fri Feb 15, 2013 7:30 pm
Forum: Windows
Topic: Using "select-all" just for audio
Replies: 8
Views: 1127

Re: Using "select-all" just for audio

You're right, it is rather queer. I don't know why Audacity passes short sounds to the effect, as if they would have the same duration as the longest one. I guess that it simplifies the code execution. I can only talk for Nyquist effects. If I want to write a really multi-track selection suitable pl...
by Robert J. H.
Wed Feb 13, 2013 10:02 am
Forum: Nyquist
Topic: REQ: R1 MF ("Blue box") Tone Generator
Replies: 40
Views: 13307

Re: REQ: R1 MF ("Blue box") Tone Generator

Perhaps I won't need these tones myself. Nevertheless it's an interesting task, so I gave it a try too. I've been playing with some recursive code (loops get boring over time). I only wanted to contribute some code for the sorting out of the text input but ended up with nearly the whole plug-in. The...
by Robert J. H.
Tue Feb 12, 2013 9:32 pm
Forum: General Audio Programming
Topic: How to compute SPL from sound inputed from a microphone.
Replies: 42
Views: 50365

Re: How to compute SPL from sound inputed from a microphone.

Hi Koz Have I missed something? What are you refering to? Taking the rms of a single point does never make any sense, neither analog nor digital. However, the Rms for a complex (i.e. complicated) waveform is straightforward and really easy implemented. There are 4 types of RMS which are facetiously ...
by Robert J. H.
Mon Feb 11, 2013 11:28 pm
Forum: Nyquist
Topic: Beginner's question
Replies: 43
Views: 16517

Re: Beginner's question

There's still a great deal of misunderstanding, I am afraid. Please forget your previous code examples, they do not fit into the conventions of the pan command. Especially the strange scale factor of (/ 1 0.697522). Can you please explain why do you insist on this value? It is simply too big, as it ...
by Robert J. H.
Sun Feb 10, 2013 8:33 pm
Forum: Nyquist
Topic: Beginner's question
Replies: 43
Views: 16517

Re: Beginner's question

Hello Sirs. I thank the moderators for their help. On the other hand, I am sorry, I did not understand the end of Robert J.H.'s message. "...multiply by 0.5. The lfo goes now from -0.5 to 0.5..." It is the function [(sum] which multiplies? Either, is it necessary to multiply the duration in seconds...
by Robert J. H.
Sat Feb 09, 2013 7:29 am
Forum: Nyquist
Topic: Beginner's question
Replies: 43
Views: 16517

Re: Beginner's question

Hi Let us firstly look at the source code of the pan function excerpt from my nyquist-reference plug-in) Source-code for this Function (182/358): (PAN (SOUND WHERE) (VECTOR (MULT SOUND (SUM 1 (MULT -1 WHERE))) (MULT SOUND WHERE))) Category: Sound Synthesis, as found in : Nyquist.Lsp Description: Pan...
by Robert J. H.
Tue Jan 29, 2013 9:36 pm
Forum: Nyquist
Topic: A Study in Pink
Replies: 26
Views: 10422

Re: A Study in Pink

I think that our examples are quite fast for Nyquist code that verges in such a manner to DSP implementations. Most functions are very fast as long as we do not try to gather information. For example, sref is very slow because it evalueates the whole sound to get the last value. There is unfortunate...