Volume Control of a PCM file

Started by deer...@tataelxsi.co.in in Audio Signal Processing6 years ago

Hi, I am planning to write a code for volume control. My input and output are .pcm files. I will be giving the required gain in dB. If I...

Hi, I am planning to write a code for volume control. My input and output are .pcm files. I will be giving the required gain in dB. If I give say 5dB as the gain factor, and calculated the required multiplication factor using the equation dB value = 20log(Vout/Vin) that is Vout = Vin * 10^(dB value/20) My doubt is that, is it enough to multiply the input samples w...


Need help for down sample and up sample of audio file

Started by moonnightingale in Audio Signal Processing7 years ago 5 replies

I am having a wave file. I have to implement this operation on it. Since picture cannot be attached i am writing the steps input speech...

I am having a wave file. I have to implement this operation on it. Since picture cannot be attached i am writing the steps input speech signal-----> [ Low pass filter of 4 KHz----> Decimate the Signal by M] -----> [ interpolate the signal by L -----> Low pass filter of 4 KHz]----> output I have read the wave file in matlab. Now i want to implement the above steps in matlab , i am stuck with


Re: Guitar effects

Started by supe...@hotmail.com in Audio Signal Processing7 years ago

> HI guys > I am working on a guitar effects DSP.This will include some > modulation effects like >...

> HI guys > I am working on a guitar effects DSP.This will include some > modulation effects like > chorus/phaser/flanger/reverb/delay/distortion.Ne one playing a guitar > will understand what i am talking about.I am looking at a low cost > dsp > some under $8.I am new to dsp and i would like you guys to help me > out > in tring to select the right DSP.Basically i feel for a low co


Re: Guitar Valve Preamp with DSP

Started by supe...@hotmail.com in Audio Signal Processing7 years ago

Hi. I've working with al TMS320C613 DSK building some guitar effects. > I was suscesfully whit all of these but I had no idea about build...

Hi. I've working with al TMS320C613 DSK building some guitar effects. > I was suscesfully whit all of these but I had no idea about build a > valve guitar preamp on DSP. In other forums, people said I have to > decimate, interpolate and check out curves in the valve 12AX7's > datasheet and process the signal with that. The thing is .... I'm > still have not much idea about it. > > Is someone


Re: guitar effects

Started by supe...@hotmail.com in Audio Signal Processing7 years ago

Do any of you know of any good sites that contain digital > implementations of a couple simple guitar effects that can be > simulated in...

Do any of you know of any good sites that contain digital > implementations of a couple simple guitar effects that can be > simulated in MATLAB? Any help is appreciated, thanks! > > Ray > > Implementations - no, but there are many great research papers and articles from which, if you have the math background, you should be able to implement your own models. That's how I started. I read nu


Comparing the spectra of two acoustic signals

Started by turc...@gmail.com in Audio Signal Processing7 years ago 5 replies

Hello everybody, I want to compare the spectra of two acoustical signals (very short signals, with duration less than 300 milliseconds), but I...

Hello everybody, I want to compare the spectra of two acoustical signals (very short signals, with duration less than 300 milliseconds), but I donĀ“t know which way is the best. I would like to have a measure indicating where in the spectrum of a signal there is more energy. Should I use the power spectral density? I just want to know a general measure for the spectrum, a number summarizin...


Audio Compression using STFT

Started by arpl...@gmail.com in Audio Signal Processing7 years ago 1 reply

Hello all, I had some questions regarding audio compression (bit reduction) using the Short Time Fourier Transform. I am trying to implement...

Hello all, I had some questions regarding audio compression (bit reduction) using the Short Time Fourier Transform. I am trying to implement this in MATLAB. For the STFT, my method has been as follows: 1. Window the desired signal by multiplying the signal with a rectangle of desired length (256 pts for example) 2. Perform an FFT on each of these short time sections 3. Look at the frequ...


Frequency detection on device with that has high pass filter

Started by thun...@hotmail.com in Audio Signal Processing7 years ago 2 replies

I'm trying to do frequency detection on a class of devices whose PCM encoder applies a high pass filter. My frequency detection algorithm works...

I'm trying to do frequency detection on a class of devices whose PCM encoder applies a high pass filter. My frequency detection algorithm works well unless I try and do frequency detection for the lower notes that are dampened by the HPF. Determining the frequency with the highest peak should work fine for the types of sounds I use (the fundamental frequency is always the loudest in my environ...


I would like to design my version of OPL3

Started by vikramrchari in Audio Signal Processing7 years ago

Hello: My name is Vik. I'm interested in digital electronic music. I have a question is about an audio electronic project. Auditory...

Hello: My name is Vik. I'm interested in digital electronic music. I have a question is about an audio electronic project. Auditory electronics is a field I'm very interested in. It is my hobby. I would like to design [but not necessarily build] my version of the OPL3 FM synthesizer chip for myself. I want to design each and every element of the chip on my own so I know I'm getting what I...


Board for a 5 way Crossover

Started by "Burgwedel Friedrich (Ask De)" in Audio Signal Processing7 years ago

Have a look at the SigmaDSP series from Analog Devices, there are versions that integrate the CODEC, and they are supported by the...

Have a look at the SigmaDSP series from Analog Devices, there are versions that integrate the CODEC, and they are supported by the Sigma Studio software, so there's no need to code it from scratch. Cirrus and TI do have similar treats. Regards, F. From: a...@yahoogroups.com [mailto:a...@yahoogroups.com] On Behalf Of m...@gmail.com Sent: Mittwoch, 11. April 2012 19:36 To: a...@yahoo...


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