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Questions tagged [frequency]

The rate at which a thing occurs or is found.

The rate at which a thing occurs or is found.

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Unable to get correct frequency value on iphone

I'm trying to analyze frequency detection algorithms on iOS platform. So I found several implementations using FFT and CoreAudio (example 1 and example 2). But in both cases there is some imprecision in frequency exists: (1) For A4 (440Hz) shows…
Dmitry Klimkin
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Limiting Update Frequency / Purging Update Cache

I have a User Interface that receives asynchronous notifications from a Service that prompts it to re-read information from a Database. The async notifications contain a primary key that can be used to retrieve the modified record. Under load, I…
g.d.d.c
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increasing record time in android?

I have a frequency indicator sound recorder which record sound successfully but it record for only 4 seconds.I need more than 4 seconds to record the code is given below: public class vr1 extends Activity { private static final int…
Ramz
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Java: 2D Perlin Noise Creation

There are not many easy-to-follow Perlin Noise tutorials out there and certainly not in Java or 2D. I followed this tutorial to a point but it doesn't explain 2D noise very much at all. I know you have to generate an array of numbers then…
MrDrProfessorTyler
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Finding items in a table that satisfy a subset frequency condition?

I have a very simple item ownership table with these two columns: UserID, ItemID There is an index on UserID, but not ItemID. I have a set S of 10-40 specific ItemIDs (in my queries they are just a comma delimited list of integers). I want to find…
John Shedletsky
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Ruby : force rand frequency

I have to run a piece of code at randomly chosen times but I have to run it about once a day for instance. The program is not running all time so I can't really force it to run every hour and do something like if rand(1..24) == 1 How can I manage to…
Cydonia7
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Search Pattern Frequency

Preferably PHP solutions -- but any ideas would be great. Give a text blob 'This is a super string of some content whree I want to find red sweaters and purple elephants. The purple elephants will count twice. and the red sweaters will count 3…
cgmckeever
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Effects for bad sampling in frequency formula

Is there any formula to calculate the frequency (or frequencys) of a signal that is bad sampled? For example, what's the output of an analog signal with F=22Khz when it's sampled at 25Khz, or 10Khz? EDIT: In this example, the sampled signal (on the…
rnunes
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how to change the sound tone in C#

i'm developing an application that aims to record the voice of the user and play it in different tones ( female tone , robot tone ) i wanted to know what changes do i need to do in the sound that needed to achieve those voices (the pitch of the…
Hady Elsahar
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Find frequency of peaks

I need some help determining the frequencies of these small peaks. I know it should just be a FFT of the original function, but I am having trouble with the practical implementation. Can someone help me how to do this - preferable using matlab. not…
Markus
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java: Find integer's frequency in an array

I need to develop a java program that asks the user to enter some integers and find the largest, and smallest number, and the average of those numbers. Then, divides the set of array into a number of sub-intervals that the user specifies, then it…
Aisha S
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How to find the musical scale of a Micrphone Stream (Flutter)

I'm trying to listen to micrphone stream and finding the scale of the audio being read by the stream. I'm using mic_stream package for my flutter project, and need to understand how to find the frequency of the audio and then find the scale of the…
mk117
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Read CPU Frequency in Android

I am reading the cup's max frequency from "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq" this file in Android Studio. But I am always getting less frequency than shown in the device's info page/claimed by the company. I was testing it in…
Sam
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C# ManagedBass Frequency Changes Playback Speed

I am currently writing a small C# .Net Forms program that is based on the XMPlayer and also uses its functions. For this I use the library ManagedBass and ManagedBass.Fx. Everything works fine so far, but I noticed that most of my songs are pitched…
Zongo
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Creating time of day frequency chart

I want to create a chart that shows how many orders are active at a certain time of day in excel, below is an example data set. At any given time for one day I would like to visually see how many active orders so lets say at 9:45am there are 3…
user21920024
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