problem solving spectral roll off equation in matlab

Started by jarvis0213 in comp.dsp13 years ago

can any one help me out with this try to do a music/speech discriminator but got problem to make a spectral rolloff feature dont know how to...

can any one help me out with this try to do a music/speech discriminator but got problem to make a spectral rolloff feature dont know how to solve the equation of spectral roll off can some one help here please set M[f]=3,2,5,6,10,4,7,9,1,13 sum(M(1:n)=0.85*(sum(M[f])) need to find "n"


RCA to BNC - any point?

Started by Barry in comp.dsp16 years ago 9 replies

Hi all, I have a Codec (2ADCs and 2DACs), which is capable of 16bit per channel sampling, at 96kHz. It interfaces to a DSP board. I...

Hi all, I have a Codec (2ADCs and 2DACs), which is capable of 16bit per channel sampling, at 96kHz. It interfaces to a DSP board. I have designing a pcb board capable of processing an analog music signal, and I'd like to interface it to an ADC on my codec. I'd also like to send a signal from the DAC to a second pcb board. I'm just wondering what would be the best way of doing this? The Cod...


Storage requirements for compressed audio

Started by Richard Owlett in comp.dsp4 years ago 16 replies

The church I belong to is planning a website which will include recorded sermons. The proposal for site design and hosting did not explicitly...

The church I belong to is planning a website which will include recorded sermons. The proposal for site design and hosting did not explicitly mention how much online storage was included. A brief search told me a minute of MP3 occupied ~1 MB. No mention of fidelity. I assume that would be satisfactory for speech. What if they wanted to record choral music. I know essentially nothing a...


About "wavetable synthesis" as described in "Applications of Digital Signal Processing"

Started by robert bristow-johnson in comp.dsp7 years ago 1 reply

Dear Dr. Mitra, I've been hoping to possibly run into you sometime at a professional conference, perhaps the IEEE WASPAA (a.k.a. Mohonk),...

Dear Dr. Mitra, I've been hoping to possibly run into you sometime at a professional conference, perhaps the IEEE WASPAA (a.k.a. Mohonk), but I haven't been to that conference since 2001 and I haven't yet seen you at an Audio Engineering Convention (and, admittedly, I'm not in IEEE). I am now working for a company in Calabasas (Music Mastermind) so I hope that someday I can meet yo...


Crossover in digital domain?

Started by Robin Bowes in comp.dsp15 years ago 4 replies

[Also posted to music-dsp mailing list] Hi, I'm playing around with my bi-amping audio system [1] and an idea popped into my head: instead...

[Also posted to music-dsp mailing list] Hi, I'm playing around with my bi-amping audio system [1] and an idea popped into my head: instead of feeding the same signal to both HF and LF drivers and relying on the crossovers built into the speakers, why not have a crossover in the digital domain and use two DACs each feeding a separate amplifier? [1] Squeezebox -> Art DI/O DAC -> Rot


OT: One of My Non-MIDI, Non-Soundcard, Non-Synth, Music Fantasy.

Started by Radium in comp.dsp13 years ago 12 replies

Hi: Eliminate all vocalizations, kicks, spikes, clicks, snares, hiss, saxophones, leads and similar instruments by recognizing...

Hi: Eliminate all vocalizations, kicks, spikes, clicks, snares, hiss, saxophones, leads and similar instruments by recognizing their waveforms rather than removing the central channel of a recording. Current "voice cancellers" work by ridding whatever is identical in both right and left. This would not eliminate vocals if they were recorded differently in the right and left channels. I d...


keeping the beat

Started by RichD in comp.dsp9 years ago 31 replies

Last week I attended a blues concert. It was called blues, but they rocked! Not the traditional ballad style, but high energy. At one...

Last week I attended a blues concert. It was called blues, but they rocked! Not the traditional ballad style, but high energy. At one point, during an instrumental, the audience clapped along with the music. The band included electric guitar and bass, acoustic bass, piano, drums, and trumpet. It was not a simple melody, the orchestration was complex, each instrument playing its own par...


=?utf-8?B?4pa64pa64pa6R2V0IEZSRUUgU2F0ZWxsaXRlIFRWIG9uIHlvdXIgUEMg4peE4peE4peE?=

Started by Y Waugh in comp.dsp13 years ago

Watch Satellite TV On Your Computer Without Paying Monthly Fees... FOR FREE? Watch all your favorite shows on your Computer from anywhere in...

Watch Satellite TV On Your Computer Without Paying Monthly Fees... FOR FREE? Watch all your favorite shows on your Computer from anywhere in the World! Save 1000's of $$$ over many years on cable and satellite bills. INSTANT DOWNLOAD Plus Free Unlimited Downloads Movies, MP3s Music, etc !!! More Details: http://tvonpc.us.to/


what are the appearance of aliasing in image and audio processing?

Started by kiki in comp.dsp16 years ago 4 replies

Hi all, I've heard a lot of aliasing. What do they look like in image and audio/speech/music with aliasing? I did not see/hear any real...

Hi all, I've heard a lot of aliasing. What do they look like in image and audio/speech/music with aliasing? I did not see/hear any real aliasing stuff, so the concept of aliasing looks abstract to me, although I know how it occurs in terms of mathematics... I am also wondering about the anti-aliasing filter before downsampling... By filtering, you lose information, right? It is har...


real time FFT on c6713 DSK

Started by olubern in comp.dsp14 years ago 3 replies

I'm trying to do a 2048 pt real FFT using fft6713.c as my reference code. When I tested this code with a CD music, (fs changed to 44.1KHz) I...

I'm trying to do a 2048 pt real FFT using fft6713.c as my reference code. When I tested this code with a CD music, (fs changed to 44.1KHz) I realize some of the samples from the ADC were overwritten while the FFT is being done (Obviously I can't do the FFT process in one sample time) Is there a way to store samples from the ADC and do the FFT prcoessing simultaneouly on the C6713 DSK. The mai...


Damped MUSIC (DMUSIC) Algorithm

Started by jfaller30 in comp.dsp12 years ago 5 replies

Hi, I am trying to implement the 1D DMUSIC algorithm described in: [1] Y. Li, J. Razavilar, and K. Liu, "A Super-Resolution...

Hi, I am trying to implement the 1D DMUSIC algorithm described in: [1] Y. Li, J. Razavilar, and K. Liu, "A Super-Resolution Parameter Estimation Algorithm for Multi- Dimensional NMR Spectroscopy," University of Maryland, College Park, MD 1995. I am not sure what is wrong with my MATLAB code. Does anyone know if there is an implementation available for download? My MATLAB code is: funct...


IIR constant Q bandpass filters

Started by loopy in comp.dsp14 years ago 1 reply

Hi, I would like to apply constant Q IIR filters to a music signal of 44100Hz where each filter matches the frequency of the western well...

Hi, I would like to apply constant Q IIR filters to a music signal of 44100Hz where each filter matches the frequency of the western well tempered tuning system. This equates to 12 tones per octave. At the moment I have achieved this using large custom FIR filters in Matlab and it takes 5 minutes to process 1.1s of data! I would like to apply IIR filters and end up with an envelope of the...


Processor for music Synthesis

Started by hsmdsp in comp.dsp10 years ago 3 replies

Guys/Gals(?), I am working on a synthesizer for an Indian instrument (Tanpura, an instrument with 4 strings,that are plucked in a regular...

Guys/Gals(?), I am working on a synthesizer for an Indian instrument (Tanpura, an instrument with 4 strings,that are plucked in a regular sequence continuously, for most live performances). My algorithm is straight forward and involves STFT based analysis and synthesis. I already have the C program working on PC platforms ( You can ask me (umpmpm@gmail.com) for a demo, it sounds good !!) and ...


sound card output to matlab giving funny noise

Started by Adam Chapman in comp.dsp11 years ago

Hi, I posted this on in the matlab forums but got no response, thought I might find somebody with more relevant knowledge here. Basically....

Hi, I posted this on in the matlab forums but got no response, thought I might find somebody with more relevant knowledge here. Basically. Whilst playing music on Itunes or windows media player, I ran the following code to get and plot 20 seconds of audio data: ai = analoginput('winsound'); Fs=8000; time=20; set(ai,'SamplesPerTrigger',Fs*time) addchannel(ai, 1); tic; start(ai);...


Super-computer kickstarter, ending soon!

Started by Michael Shonle in comp.dsp8 years ago 1 reply

Hey, and sorry if this is spammy or otherwise inappropriate, but I just heard about this kickstarter campaign to make a 16-core (and 64- core...

Hey, and sorry if this is spammy or otherwise inappropriate, but I just heard about this kickstarter campaign to make a 16-core (and 64- core coming soon) parallel floating point "supercomputer" running at 1 GHz (!), seems like just the ticket for a lot of music/audio algorithms, and free open source development tools. http://www.kickstarter.com/projects/adapteva/parallella-a-supercomputer-...


Independent component anlaysis on mono signal

Started by Apc in comp.dsp16 years ago 2 replies

Hi, Im trying to do Independent Component analysis on Mono signal.this means extracting music or voice or effects from a mono signal...

Hi, Im trying to do Independent Component analysis on Mono signal.this means extracting music or voice or effects from a mono signal which has a mixture of all these three.Anybody could please give me some links or websites or piece of code for this.It would be great if somebody could help me out Thanks a lot Akash


Help With Sony CD Copy Protection!

Started by Ryan in comp.dsp15 years ago 6 replies

Hi, I recently purchased a music CD that was an import disc from the UK not available here in the US. I didn't realize until I receieved it...

Hi, I recently purchased a music CD that was an import disc from the UK not available here in the US. I didn't realize until I receieved it and wanted to copy it's tracks to my hard drive with the rest of my MP3 collection that Sony apparently has a copy protection device on this CD! I have hundreds of CDs and have never seen this before. Apparently, in order for me to copy and play th...


Re: PCM

Started by Ben Bradley in comp.dsp15 years ago

In comp.dsp,rec.audio.tech,sci.optics,rec.music.makers.synth,alt.os, On Mon, 03 Oct 2005 17:30:43 -0400, Jerry Avins wrote: > Arny Krueger...

In comp.dsp,rec.audio.tech,sci.optics,rec.music.makers.synth,alt.os, On Mon, 03 Oct 2005 17:30:43 -0400, Jerry Avins wrote: > Arny Krueger wrote: > > "Don Pearce" wrote in message > > ... > > > > > It would sound like noise. > > > > > > Indeed if it didn't sound like noise, I would be sending > > > the codec back to the writer for a better try. > > > > > >


DOA based beamformer

Started by krish_dsp in comp.dsp12 years ago 1 reply

Hi everyone, I am doing a project in DOA based beamformer in fixed point DSP. I have a doubt. Can an eigen beamformer be used in DOA based...

Hi everyone, I am doing a project in DOA based beamformer in fixed point DSP. I have a doubt. Can an eigen beamformer be used in DOA based beamformer. The DOA (MUSIC algorithm) estimator calculates the direction of the incoming signal and beamformer designs the radiation pattern such that the main lobe is directed towards the signal of interest and nulls towards the interfereces. Can I use an ei...


How to apply Fourier Transform to audio files in Matlab? Or something else?

Started by Mudchild in comp.dsp13 years ago 3 replies

Greetings I hope I'm in the right place, and forgive me if I appear dumb! I need to do Fourier Transform analysis of some audio...

Greetings I hope I'm in the right place, and forgive me if I appear dumb! I need to do Fourier Transform analysis of some audio impulse response files, for a Uni assignment (Music Engineering). I have been recommended to use Matlab for this, and as my Uni has it, I have gained access... however I do not really know how to operate the program, and unfortunately I don't have time to start ...