<< Chapter < Page Chapter >> Page >

.....

Listing 7 . The class named FMSweep.
/*File FMSweep.java Copyright 2014, R.G.BaldwinRevised 08/19/14 This class can be used to create an 8-second stereo melody consisting of alinear frequency sweep with a linear pan between speakers. ******************************************************************************/import java.io.*; import java.nio.*;import java.util.*; public class FMSweep extends AudioSignalGenerator02{public FMSweep(AudioFormatParameters01 audioParams,String[] args,byte[] melody){super(audioParams,args,melody); }//end constructor//-------------------------------------------------------------------------////This method returns an array that will play an 8-second melody consisting // of a linear frequency-modulated sweep from a low frequency of middle-C// to a high frequency that is one octave above middle-C. During the // frequency sweep, the sound pans linearly from the left speaker to the// right speaker. //byte[] getMelody(){//Set channels to 2 for stereo overriding the default value of 1. audioParams.channels = 2;System.out.println("audioParams.channels = " + audioParams.channels); //Each channel requires two 8-bit bytes per 16-bit sample.int bytesPerSampPerChan = 2;//Override the default sampleRate of 16000.0F. Allowable sample rates // are 8000,11025,16000,22050, and 44100 samples per second.audioParams.sampleRate = 8000.0F;// Specify the length of the melody in seconds. double lengthInSeconds = 8.0;//Set the low and high frequencies to cause the sweep to cover one full// octave. double lowFreq = 261.63;//middle Cdouble highFreq = 2*lowFreq; //Create an output data array of sufficient size to contain the melody at// "sampleRate" samples per second, "bytesPerSampPerChan" bytes per // sample per channel and "channels" channels.melody = new byte[(int)(lengthInSeconds*audioParams.sampleRate* bytesPerSampPerChan*audioParams.channels)]; System.out.println("melody.length = " + melody.length);//Set the overall gain to a value that is compatible with 16-bit audio// data. double gain = 8000.0;//Declare variables used to control the output volume on the left and // right speaker channels.double leftGain = 0.0; double rightGain = 0.0;//Declare a variable that is used to control the frequency. double freq = 0.0;//Prepare a ByteBuffer for use byteBuffer = ByteBuffer.wrap(melody);//Compute the number of audio samples in the melody. int sampLength = (int)(lengthInSeconds*audioParams.sampleRate);//Compute the audio sample values and deposit them in the output melody // array.for(int cnt = 0; cnt<sampLength; cnt++){ //Compute the time in seconds for this sample.double time = cnt/audioParams.sampleRate;//Compute the frequency for this iteration freq = lowFreq + (highFreq - lowFreq)*cnt/sampLength;//Adjust the left and right gain values to cause the sound to pan // linearly from the left speaker to the right speaker.rightGain = gain*1.0*cnt/sampLength; leftGain = gain*1.0-rightGain;//Compute scaled values and deposit them into the melody. byteBuffer.putShort((short)(leftGain*Math.sin(2*Math.PI*freq*time)));byteBuffer.putShort((short)(rightGain*Math.sin(2*Math.PI*freq*time))); }//end for loopreturn melody;}//end method getMelody //-------------------------------------------------------------------------//}//end class FMSweep //===========================================================================//

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Accessible objected-oriented programming concepts for blind students using java. OpenStax CNX. Sep 01, 2014 Download for free at https://legacy.cnx.org/content/col11349/1.17
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Accessible objected-oriented programming concepts for blind students using java' conversation and receive update notifications?

Ask