Programs for implement tools for digital sound, Computer Networking

You must write the 6 programs described below. All of these are command-line tools that follow the Unix style of passing switches and arguments on the command line. As such, your programs should never prompt the user for anything. You may assume that all switches appear before the first argument. The requirements below are minimal requirements; you may provide extra functionality or handle extra cases as you choose. For example, you might include a --debug switch that causes extra debugging information to be written to standard error. As a general rule, your programs should be user friendly". That means they should print useful error messages whenever possible. Additionally, your programs should print any messages or diagnostic information to standard error, with standard output reserved for sound output. I do not require that your programs be absolutely \quiet", but take care that the default behaviour prints at most a few messages.

All programs should handle the following 2 formats for sound files: .cs229 format, and .wav format, described in Appendix B. Similarly, all programs should accept the -h switch, which causes the program to display a "help" screen and then terminate. The help screen should describe the program, its usage, and all legal switches (including any extra ones you implemented).

1.0 sndinfo

This program reads all sound files passed as arguments, and for each one, displays the following.

 The file name

 The file type (.cs229 or .wav)

 The sample rate

 The bit depth

 The number of channels

 The number of samples

 The length of the sound (in seconds)

If no files are passed as arguments, then the program should read from standard input. The only required switch for this program is -h.

1.1 sndcat

This program reads all sound files passed as arguments, and writes a single sound file that is the concatenation of the inputs. If no files are passed as arguments, then the program should read from standard input. You must support the following switches.

-h: show the help screen.

-o file: specify the output file name; if omitted, write to standard output.

-w: output in .wav format instead of .cs229 format

1.2 sndchan

This program reads all sound les passed as arguments, and produces a single sound le where each channel corresponds to one of the input le channels (channel order should be preserved). For instance, if the first sound le has 2 channels and the second sound le has 3 channels, then this produces a sound le with 5 channels. If no les are passed as arguments, then the program should read from standard input. You must support the following switches.

-c n : output channel n only; otherwise all channels

-h : show the help screen.

-o file : specify the output le name; if omitted, write to standard output.

-w : output in .wav format instead of .cs229 format.

1.3 sndmix

This program reads all sound les passed as arguments, and "mixes" them into a single sound le. The program is invoked as

sndmix [switches] mult1 file1 ...multn filen

where the sample data of filei is multiplied by multi (a real value between -10 and 10); the scaled data is summed to produce the output le. You must support the following switches.

-h : show the help screen.

 -o file : specify the output le name; if omitted, write to standard output.

-w : output in .wav format instead of .cs229 format.

1.4 sndgen

This program is a mess of switches. It produces a sound of a specified frequency and waveform, using a simple ADSR envelope (see Appendix D). You must support the following switches.

-h : show the help screen.

-o file: specify the output le name; if omitted, write to standard output.

-w: output in .wav format instead of .cs229 format

--bits n : use a bit depth of n

--sr n : use a sample rate of n

-f r : use a frequency of r Hz

-t r : total duration of r seconds

-v p : Peak volume. 0  p  1

-a r : attack time of r seconds

-d r : decay time of r seconds

-s p : sustain volume. 0  p  1

-r r : release time of r seconds

--sine : generate a sine wave

--triangle : generate a triangle wave

--sawtooth : generate a sawtooth wave

--pulse : generate a pulse wave

--pf p : Fraction of the time the pulse wave is "up"

Note that the volume parameters are given as the percentage of the maximum volume.

1.5 sndplay

This program reads a music file in .abc229 format and produces a sound file of that music.

You must support the following switches.

-h : show the help screen.

-o file : specify the output file name; if omitted, write to standard output.

-w: output in .wav format instead of .cs229 format

--bits n: use a bit depth of n

--sr n : use a sample rate of n

--mute n : do not play instrument n

Posted Date: 2/25/2013 12:19:00 AM | Location : United States







Related Discussions:- Programs for implement tools for digital sound, Assignment Help, Ask Question on Programs for implement tools for digital sound, Get Answer, Expert's Help, Programs for implement tools for digital sound Discussions

Write discussion on Programs for implement tools for digital sound
Your posts are moderated
Related Questions
PROTOCOL SOFTWARE AND ETHERNET WIRING:  All wiring methods use identical Ethernet specifications. e.g. they need same message format. They need same CSMA/CD algorithems. They m


Explain the Physical layer The Physical layer of the OSI model sets standards for sending and receiving electrical signals among devices. It explains how digital data (bits) ar

Thus now you know how packets travel from one computer to another computer over the Internet. however what's in-between? What in fact makes up the Internet infrastructure or backbo

What is the difference among URL instance and URL Connection instance? Ans) A URL instance represents the location of a resource, and a URL Connection instance shows a link for

Firewalls After several  security  related internet  newsgroups  started overflowing  with posts it becomes  clear something  hand to done to help  secure  networks. The first

Memory Memory Layout   BOOTROM This device stores the information of  the startup diagnostic  code in permanently. It performs diagnostics of  hardware  wh

What is a LAN? LAN stands for Local Area Network. It refers to the connection among computers and other network devices that are located within a small physical location.

In FLSM subnet mask of all subnets will b same. But in FLSM it changes.

These two command show the cisco IOS filename a) show ver b) show flash