keeping the beat

Started by RichD in comp.dsp8 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...


Independent component anlaysis on mono signal

Started by Apc in comp.dsp15 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


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

Started by kiki in comp.dsp15 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...


Noob to DSP and NOT a math major!

Started by dugernaut in comp.dsp8 years ago 10 replies

I'd like to get started working with DSPs for music synthesis, but I have no idea where to start. I flunked HS math (big time) so it seems...

I'd like to get started working with DSPs for music synthesis, but I have no idea where to start. I flunked HS math (big time) so it seems I've started with a huge disadvantage. However, I'm a pretty clever guy and have been designing analog synths and (simple) embedded hardware stuff for years. My question??? Where do I start. TI is offering a $55 development kit that's almost too temp...


Damped MUSIC (DMUSIC) Algorithm

Started by jfaller30 in comp.dsp11 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...


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...


spectrum analyzer/equalizer

Started by dr.oktopus in comp.dsp8 years ago 2 replies

Hello, I am searching for good references on programming a spectrum analyzer/equalizer like those seen on most music players. I read about the...

Hello, I am searching for good references on programming a spectrum analyzer/equalizer like those seen on most music players. I read about the fast fourier transform, however the complete task seems full of details that I ignore. I tried to look inside opensource players (xmms), but perhaps a good overview of all is better to begin with. Thanks, wily


Crossover in digital domain?

Started by Robin Bowes in comp.dsp14 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


Reminder: CFP 8th EVOMUSART conference

Started by Luz Castro in comp.dsp8 months ago

------------------------------------------------ Call for papers for the 8th EVOMUSART conference Please distribute (Apologies for cross...

------------------------------------------------ Call for papers for the 8th EVOMUSART conference Please distribute (Apologies for cross posting) ------------------------------------------------ The 8th International Conference on Computational Intelligence in Music, Sound, Art and Design (evoMUSART) will be held in Leipzig, Germany in 24-26 April 2019, as part of the evo* event. Th


detecting white noise... shower running?

Started by briang2000 in comp.dsp10 years ago 21 replies

Hi, We've got a safety-related application where we'd like to determine if a shower is running in the bathroom. Does anyone have any...

Hi, We've got a safety-related application where we'd like to determine if a shower is running in the bathroom. Does anyone have any suggestions on how that determination could be made by sound? Might a shower have a specific white noise characteristic that could be identified as unique from music playing, toilet flushing, talking, etc.? Kinda strange question... but just thought I'd bo...


Help. Too Many Beats in Beat Detection.

Started by kiplring in comp.dsp16 years ago 1 reply

I'm trying to implement "Tempo and Beat Analysis of Acoustic Musical Signals" in C#. Currently I made LowPass, HighPass, BandPass filter, And...

I'm trying to implement "Tempo and Beat Analysis of Acoustic Musical Signals" in C#. Currently I made LowPass, HighPass, BandPass filter, And Sound IO class. I filtered the music, and marked All Beats of Lower than 200Hz, Upper than 3200Hz. And I got the result which has a Lot of Beats. ( about fourth fold number of Beats) Just sensitivity change doesn't helps me. At this situ, ...


problem solving spectral roll off equation in matlab

Started by jarvis0213 in comp.dsp12 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"


configuring dip switch in dsk6713

Started by PVN in comp.dsp11 years ago 9 replies

Hey , we are a group of 4 ec students working on a project which deals with creating delay based music effects using dsk 6713. We want to...

Hey , we are a group of 4 ec students working on a project which deals with creating delay based music effects using dsk 6713. We want to use the dip switches for user interface (to decide which effect). But we are having trouble coding the interface part. Can anyone give us an idea about how we should go about coding of the switch functions? Any tutorial or help that can tell us how to code...


Audio delay circuit

Started by George W in comp.dsp15 years ago 5 replies

I have a need to measure the relative delay between two audio signals arriving at a receiver via different paths. The audio signals are...

I have a need to measure the relative delay between two audio signals arriving at a receiver via different paths. The audio signals are standard 3 kHz audio bandwidths containing voice or music. One could arrive as much as 1 msec before or after the other. I'd like to be able to measure the difference in time of arrival between the two signals down to 1 usec if that's possible. Any sugg...


Re: question about non-uniform sampling?

Started by Jerry Avins in comp.dsp9 years ago 112 replies

Ron N. wrote: > Jerry Avins wrote: > > > There's a limit to how non-uniform the sampling can be > > allowed to be. The example given above,...

Ron N. wrote: > Jerry Avins wrote: > > > There's a limit to how non-uniform the sampling can be > > allowed to be. The example given above, of an hour's worth of music > > sampled for half an hour at twice the minimum rate for the bandwidth, is > > an adequate counterexample to what you claim is a general case. > > > For this counterexample to work, the response of the lowpass filter > for ea


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.dsp7 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-...


Re: Sampling Universe Theory

Started by Anonymous in comp.dsp11 years ago

Jerry Avins wrote: Curiosus: > > - The sampling period: the sampling process cannot represent > > accurately events shorter than the...

Jerry Avins wrote: Curiosus: > > - The sampling period: the sampling process cannot represent > > accurately events shorter than the sampling period. For example > > music CDs are using a sampling frequency of 44,100 Hz. > Shorter than twice the sampling period, assuming real > (not complex) samples. Yes, that is the formula for waves. But I had in mind a discrete pulse: if the dura


algorithms for increasing peak-to-average ratio for audio signals

Started by Robert Adams in comp.dsp11 years ago 17 replies

I am looking for an algorithm that dynamically alters the phase relationships between the spectral components of a music or voice signal in an...

I am looking for an algorithm that dynamically alters the phase relationships between the spectral components of a music or voice signal in an attempt to reduce the peak-to-average ratio. I recall hearing about this in reference to increasing the coverage range of AM transmitters but I am having trouble digging up the references. Any pointers appreciated! Bob Adams


Re: Theoretically Highest Quality of PCM Audio

Started by Clay S. Turner in comp.dsp16 years ago

Hello Bob, For uniform quantization, the S/N is 6n+4.77+(Smean/Speak) Smean/Speak is the mean to peak ratio for the signal. For a sine wave...

Hello Bob, For uniform quantization, the S/N is 6n+4.77+(Smean/Speak) Smean/Speak is the mean to peak ratio for the signal. For a sine wave it is just -3 dB; however for speech it will be much higher. It will be more like -13dB. And of course music will probably be closer to the speech value than the sine wave value. Look at Rabiner & Schafer "Digital Processing of Speech Signals" for ...