DSPRelated.com

Cheap & cheesy way to tell when sound source is pointing at you?

Started by Robert Oschler in comp.dsp19 years ago 6 replies

Hello again, It's me the novice DSP'er who would be king.. er.. frog? :) I want to tell when a sound source is "pointing" towards a...

Hello again, It's me the novice DSP'er who would be king.. er.. frog? :) I want to tell when a sound source is "pointing" towards a microphone. The sound source is mobile, but I have complete control over its movement and sound emission. I can easily play repeatedly a pre-recorded sound from the sound source, which will be identical every time it's played. Obviously, it will not be i...


Sound chip recordings... How is it done?

Started by Trains in comp.dsp18 years ago 2 replies

Sound chip (DSP) recordings... How is it done? Pardon my ignorance and naivety, but.... A group of model railroaders would like to...

Sound chip (DSP) recordings... How is it done? Pardon my ignorance and naivety, but.... A group of model railroaders would like to customize/personalize the train sound announcements that have been recorded on the sound chip on their locomotives and railcars. Is there a website that, in layman's language, explains how sound effects are "recorded" on a sound chip? ... and, how one would/c...


Sound over a phone line using voice modem

Started by Mark in comp.dsp21 years ago 3 replies

Hi, I am trying to play/record sound from my sound card over a phone line using the modem. So I have a couple of cabels connecting the...

Hi, I am trying to play/record sound from my sound card over a phone line using the modem. So I have a couple of cabels connecting the modem with the sound card. I have a standard full-duplex voice modem. I have tried different variations of AT+VLS command, but I can only receive sound from the line into the sound card (at+vls=5) I still cannot get the sound from the sound card into th...


How to go from sound analysis to sound synthesis?

Started by Anonymous in comp.dsp19 years ago 2 replies

Hi, Everyone! If I have analyzed a sound and have its spectrogram, how can I utilize that information for sound synthesis? Thank You Very...

Hi, Everyone! If I have analyzed a sound and have its spectrogram, how can I utilize that information for sound synthesis? Thank You Very Much. Truly Yours, Simon Dexter


Program for real time analysis of sound?

Started by SoundOff in comp.dsp17 years ago 4 replies

Hello I?m investigating an irritating sound in the building I live in. The sound disappears at 22.58 a clock. I have traced the sound to...

Hello I?m investigating an irritating sound in the building I live in. The sound disappears at 22.58 a clock. I have traced the sound to about 144 Hz with a program called Spectran. There I can se that it disappears at 22.57 a clock. The janitor says it may be a water circulation pump in the seller that makes the sound. I would want another program that allows filtering the...


U-Law compressed sound - best format when extract from .mov?

Started by Andrew Thompson in comp.dsp19 years ago 6 replies

I have some Quicktime MOV's that I recorded on my camera with the lens cap on, purely for the sound. Player software indicates the sound is...

I have some Quicktime MOV's that I recorded on my camera with the lens cap on, purely for the sound. Player software indicates the sound is recorded as U-Law, 16KHz, 8bit, mono. I want to extract the sound to a separate (sound specific) format for further editing, and am offered the choices (in current software) of MP3, Wav, AIFF and AU. The ideal is to get a sound-only rendition of t...


append synthesized sound frames created via additive synthesis

Started by louis in comp.dsp18 years ago 9 replies

Hi there, I am synthesizing a particular sound using additive synthesis. Hence I dont have to do any FFT's or IFFT's, I basically sum the...

Hi there, I am synthesizing a particular sound using additive synthesis. Hence I dont have to do any FFT's or IFFT's, I basically sum the individual sinusoids whose phase, frequency and amplitude components I know, to produce a complex sound. My problem is that instead of synthesizing the full 10 seconds of sound all at once, I need to be able to create them in small 'sound frames', which w...


filter driver ?

Started by Lior in comp.dsp18 years ago 2 replies

Hello guys, My name is Lior. I need your help with a project I am currently working on. I need to catch sound traveling from the modems...

Hello guys, My name is Lior. I need your help with a project I am currently working on. I need to catch sound traveling from the modems speaker phone to the sound board (SB). the sound is not traveling with wave-in/out commands but in a certain driver level, cause all of the sound when a conversation is started, is directed to the SB automatically (even when I track the number of current...


sound isolation

Started by jrsmith5601 in comp.dsp16 years ago 14 replies

Im trying to find software that allows me to import a song from a band and have that sound broken down into all its different components (like in...

Im trying to find software that allows me to import a song from a band and have that sound broken down into all its different components (like in CSI when they have all the different sound waves and can listen to each one individually).. not sure if this is possible so any suggestions would be helpful


cross correlation

Started by maz_p5 in comp.dsp16 years ago

Hello, My name is maz and I am working on simple sound source localization. My question is how do I calculate the delay between these two sound...

Hello, My name is maz and I am working on simple sound source localization. My question is how do I calculate the delay between these two sound signals using cross-correlation in matlab. (I am not considering sound for the start as i have taken the readings in a sound free environment). I do not know since I am still learning. Can you please explain with the help of the matlab code. Thank you.


OT: Hearing a phone charge up

Started by Major Misunderstanding in comp.dsp18 years ago 7 replies

A lady just contacted me and says she can hear her Nokia phone charging - like a pulsing sound. Nobody else can hear it but when it is switched...

A lady just contacted me and says she can hear her Nokia phone charging - like a pulsing sound. Nobody else can hear it but when it is switched on she registers the sound from some 2-3 metres away. When it is charged the sound stops. I also know of another person who can hear similar sounds from electrical equipment. Could this be a low frequency sound or is it something odd happening...? Wit...


Sound synthesis and signal continuity

Started by randirandi in comp.dsp16 years ago 2 replies

Hi, I am doing some experiments on sound synthesis. I've made a simple plucked string sound synthesizer (with MIDI input), but I'm experiencing...

Hi, I am doing some experiments on sound synthesis. I've made a simple plucked string sound synthesizer (with MIDI input), but I'm experiencing some problems with the end of notes. When I hit and then release a key on my MIDI keyboard, I can hear an annoying little sound because of the signal going suddently to zero when I stop the note synthesis. I tried to figure out how software like a ba...


Sound Intensity

Started by HardySpicer in comp.dsp17 years ago 13 replies

We are often told that sound intensity (I assume Power) goes down as the inverse square of distance. However, I believe this is also frequency...

We are often told that sound intensity (I assume Power) goes down as the inverse square of distance. However, I believe this is also frequency dependent (as with e/m waves). What is the equation for a sound source received at a distance d with frequency f say? I read somewhere that low frequency sound (say 50 Hz or so) will travel vast distances and is also humidity and temperature dependent....


sound card AM Transmitter

Started by Masood in comp.dsp16 years ago 28 replies

Hi All, I want to transmit AM RF signal (1khz to 20 Khz) using sound card. The audio out of sound card will be connected to Antenna...

Hi All, I want to transmit AM RF signal (1khz to 20 Khz) using sound card. The audio out of sound card will be connected to Antenna directly. i need software that take sound file and generate AM RF signal for the above range and produce desired AM signal to be transmited on air, high out put power is not required, I am unable to find any software, Any help by anyone will be highly apprec...


sound delay box

Started by Aleksander Wittlin in comp.dsp20 years ago 7 replies

Hi all, I am looking for a simple and cheap design of a sound delay box for science fair exhibit. It should simply delay microphone...

Hi all, I am looking for a simple and cheap design of a sound delay box for science fair exhibit. It should simply delay microphone signal within the range (regulated) from 0.1 to 5 seconds. Sound quality does not really matter. I considered a PC with sound card (bulky) or professional audio console (expensive). Perhaps a simple DSP board with codec and some memory plus a small preamp...


Interpolation

Started by UD.RaggedRobin in comp.dsp15 years ago 6 replies

I seek a program that will take two sound files (A and B) of approximately equal duration and produce a third sound that is a blend of A and B...

I seek a program that will take two sound files (A and B) of approximately equal duration and produce a third sound that is a blend of A and B throughout its duration. i.e. I want to be able to produce the middle sound shown below. AA AA AA AA AA ab ab ab ab ab


Sound gaps

Started by Anonymous in comp.dsp16 years ago 4 replies

Hello, A while ago this group and comp.compression were very helpful in pointing to some websites to help develop my software sound...

Hello, A while ago this group and comp.compression were very helpful in pointing to some websites to help develop my software sound driver (note: aside from the DAC all processing/filtering is done in software.). Now I have a new problem where I don't know where to look for the answer(s) so I am begging for a little help. After lots of work in improving sound quality I just ran i...


sound risks?

Started by It's me in comp.dsp21 years ago 4 replies

Good day to everybody! I've recently begun a research about computer generated sound and I still want to continue with that work for some...

Good day to everybody! I've recently begun a research about computer generated sound and I still want to continue with that work for some months. I'm creating different sounds using compositions of sinusoidal waves of different frequencies. I listen to the sound I create using the typical hi-fi equiment with tape decks, cd reader, radio and so on and an AUX input that I attach to the...


newbie: What is sound & how to invert it.

Started by news in comp.dsp20 years ago 2 replies

Hi, I am a programmer and recently got interested in the mechanics of a sound. Here is what i have done till now and will need your help to...

Hi, I am a programmer and recently got interested in the mechanics of a sound. Here is what i have done till now and will need your help to proceed from there. I am capturing sound from my microphone. And now I need to send out it's inverse( sort of 'noise cancellation' - but I am aware of the difficulties with noise cancellation). WHAT I am trying to understand is what is meant by 'inv...


Basic sound card access

Started by caalip in comp.dsp17 years ago 3 replies

Dear Neighbors, My group at school is working on a project, and I would like infomation about basic sound card input/output. i guess...

Dear Neighbors, My group at school is working on a project, and I would like infomation about basic sound card input/output. i guess what I would very like to see is what functions read form a sound card. Thanks for any ideas You can give me.