Update readme

Fixed grammar and provided some formatting

README.md

@@ -1,55 +1,55 @@
-# fm_transmitter
-Use Raspberry Pi as FM transmitter. Works on every Raspberry Pi board.
+# FM Transmitter
+Use the Raspberry Pi as an FM transmitter. Works on every Raspberry Pi board.
 
-Just get an FM receiver, connect 20 - 40 cm plain wire to Raspberry Pi's GPIO4 (PIN 7 on GPIO header) to act as an antena, and You are ready for broadcasting.
+Just get an FM receiver, connect a 20 - 40 cm plain wire to the Raspberry Pi's GPIO4 (PIN 7 on GPIO header) to act as an antena, and you are ready for broadcasting.
 
-This project uses the general clock output to produce frequency modulated radio communication. It is based on idea originally presented by [Oliver Mattos and Oskar Weigl](http://icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter) at [PiFM project](http://icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter).
+This project uses the general clock output to produce frequency modulated radio communication. It is based on an idea originally presented by [Oliver Mattos and Oskar Weigl](http://icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter) at [PiFM project](http://icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter).
 ## How to use it
-To use this project You will have to build executable. First, clone this repository, then use "make" command as shown below:
+To use this project you will have to build the executable. First, clone this repository, then use `make` command as shown below:
 ```
 git clone https://github.com/markondej/fm_transmitter
 cd fm_transmitter
 make
 ``` 
-After successful build You can start transmitting by executing "fm_transmitter" program:
+After a successful build you can start transmitting by executing the "fm_transmitter" program:
 ```
 sudo ./fm_transmitter -f 102.0 acoustic_guitar_duet.wav
 ```
 Where:
 * -f frequency - Specifies the frequency in MHz, 100.0 by default if not passed
-* acoustic_guitar_duet.wav - Sample WAVE file, You can use your own
+* acoustic_guitar_duet.wav - Sample WAV file, you can use your own
 
 Other options:
-* -d dma_channel - Specifies DMA channel to be used (0 by default), type 255 to disable DMA transfer, CPU will be used instead
+* -d dma_channel - Specifies the DMA channel to be used (0 by default), type 255 to disable DMA transfer, CPU will be used instead
 * -b bandwidth - Specifies the bandwidth in kHz, 100 by default
 * -r - Loops the playback
 
 After transmission has begun, simply tune an FM receiver to chosen frequency, You should hear the playback.
 ### Supported audio formats
-You can transmitt uncompressed WAVE (.wav) files directly or read audio data from stdin, eg.:
+You can transmitt uncompressed WAV (.wav) files directly or read audio data from stdin, eg.:
 ```
 sudo apt-get install sox
 sox star_wars.wav -r 22050 -c 1 -b 16 -t wav - | sudo ./fm_transmitter -f 100.6 -
 ```
-Please note only uncompressed WAVE files are supported. If You expire "corrupted data" error try converting file, eg. by using SoX:
+Please note only uncompressed WAV files are supported. If you receive the "corrupted data" error try converting the file, eg. by using SoX:
 ```
 sudo apt-get install sox libsox-fmt-mp3
 sox my-audio.mp3 -r 22050 -c 1 -b 16 -t wav my-converted-audio.wav
 sudo ./fm_transmitter -f 100.6 my-converted-audio.wav
 ```
-### USB microphone support
-In order to use a USB microphone input use arecord command, eg.:
+### Microphone support
+In order to use a microphone input use the `arecord command`, eg.:
 ```
 arecord -D hw:1,0 -c1 -d 0 -r 22050 -f S16_LE | sudo ./fm_transmitter -f 100.6 -
 ```
-In case of performance drop down use ```plughw:1,0``` instead of ```hw:1,0```.
+In cases of a performance drop down use ```plughw:1,0``` instead of ```hw:1,0```.
 ## Legal note
 Please keep in mind that transmitting on certain frequencies without special permissions may be illegal in your country.
 ## New features
 * DMA peripheral support
 * Allows custom frequency and bandwidth settings
-* works on every Raspberry Pi model
-* reads mono and stereo files
-* reads data from stdin
+* Works on every Raspberry Pi model
+* Reads mono and stereo files
+* Reads data from stdin
 
-Included sample audio was created by [graham_makes](https://freesound.org/people/graham_makes/sounds/449409/) and published on [freesound.org](https://freesound.org/)
+Included sample audio was created by [graham_makes](https://freesound.org/people/graham_makes/sounds/449409/) and published on [freesound.org](https://freesound.org/)