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# Audio Sampling

57 Threads found on edaboard.com: Audio Sampling

## Why does this audio DAC need external filter inspite of having internal filtering?

I presume you understand that most of the filtering of this Delta-Sigma DAC is done in the digital domain by an oversdampling digital filter. According to datasheet, I would assume that the output filter is not required because the DAC already includes an analog output filter to remove sampling residuals. There's no specification or further d

## Calculating the THD, SNR and Bandwith of amplifier

Hi, SNR means Signal to Noise Ratio. You need an input signal. It should be high in amplitude, but below clipping level. The frequency should be somewhere in near the center of interrest. (often with audio signals 1kHz is used) Then you need to sample a lot of data. sampling rate should be in integer multiple of your input signal frequency t

## What's This Sound Musically? (Included Matlab, Requires Musical Knowledge)

fs = 1760; % sampling rate You may hear musical tones at this low a sample rate. However sample rates for audio are normally much greater than this. I heard the figure 8kHz for video streaming. CD quality is 44.1 kHz.

## autoregressive model analysis

Hi, can anyone briefly explain why we need to do autoregressive model analysis for audio files? give some introduction to autoregressive model analysis?

## How does audio ADC PCM1808 in slave mode know what rate to sample the input at?

1. The discrete Fs numbers are industry standard audio sampling rates. The converter can work at different rates, the essential point is the master clock to fs ratio. 2. The internal fs divider is switched according to the actual BCLK rate. 3. A sigma-delta converter is continuously sampling the input signal and generating the output (...)

## What are different ways to provide external clock signal to an audio ADC

I know that I can use an oscillator or perhaps a PLL. A PLL appears to be a more complex component and I am not sure how I shall use it right now. Anyway, this question is related to Texas Instrument's PCM1808 audio ADC. It needs a clock input. The table in its data shows the the relationship between sampling rate and the clock input. It says:

## Choose Mixed signal processsor

Hi, I want to design a controller which capable for capturing the analog signal (from a piezo) and want to process the signal and audio out with assigned sound. Its like music instrument. I tried with pic16f877a to make the comparison, but not able to finish with the audio out part. with help of ADC I did, and also there was problem i

## using PWM as a DAC for audio output

Hi everyone, I'm going to realize an audio player with a PIC32, using PWM as a DAC for audio output. I have not write any code yet, because I want to understand deeply the theory behind it. I stored a .WAV file, 44.1 Khz sample rate, 16 bit, in a SD card, in a previous part of code. Now i want to reproduce this audio trought PWM. Because (...)

## Problems with FTDI VNC2 as a USB Isochronous (Audio) host

I am using a VNC2 (in the 32-bit VDIP board and the full Vinculum tool chain) to develop a USB audio host for a design I'm working on. My 2 test audio devices are a Logitech headset (headphones that can be mono or stereo and 8KHz to 48KHz sampling; mono microphone with the same sampling range) and a USB Soundblaster device (...)

## Micro controller based ringtone player

The main achievement of circuit simulators is the ability to predict the working and give transient current/voltage analysis of each device. Generally, for the most applications, such as audio and telephony, sampling on order of mili seconds would suffice. However, if you work with circuits having components working on scale of micro seconds suc

## bandwidth used for digital audio transmission with 44.1khz sampling rate

Hai Can anyone help me to calculate the bandwidth required for transmitting a digital audio with 44.1khz sampling rate and 16 bit depth ? regards Aneesh T V

## real problem in sampling audio signal...

Hi, all when doing the sampling for the audio, do we really care about the sampling rate? I mean as long as we satsify the nyquist conditoin, we will always get back the original audio? The process is done on a PC, I tired several times, it seems this is true. If so, does this mean the reconstruction filter I (...)

## re-sampling techniques

Not sure about specifically what kind of resampling topic you are looking at. Resample can refer to aligning signals that need to be syncronized. For example if you have two independent async digitized audio signal that need to be combined into a single data stream you need to resample one or both to get symbol/bit alignment to allow combining

## [Moved] how to configure dsPIC30F4013 ADC for Audio sampling

dsPIC30F4013 ADC configuration help looking for a single channel, maximum sampling rate , minimum conversion time 12 bit ADC configuration. Thanks in advance...

## Demodulation Algorithm for FSK Modulated Data (similar to Caller ID) in C

I want to demodulate and decode FSK Modulated audio Data in C Language. Data is modulated using similar algorithm as of Caller Id. Can anyone suggest me any good and efficient algorithm for this. I tried zero crossing algorithm but it was not efficient as no. of samples per bit were less to get an accurate result sampling Rate is 8Khz C

## Sound Pressure Level from FFT

In a test cell for diesel engines I am sampling audio from a high-quality industrial microphone and performing an FFT, from which I hope to extract a sound pressure level in dB comparable to a commercial dosimeter to measure how loud the engine is. At this point I am not concerned about absolute references starting with the microphone's sensitivit

## Making a USB soundcard

Hi ripitup, I suppose you want your 6 inputs to be good quality audio so you'll probably have a sampling rate of something like 44,100Hz per channel. Using one ADC and some multiplexing you can probably get it working, the main factor here is how fast your ADC can go. If you use a microcontroller as the interface between USB and the channels,