What do you mean by external memory?
Connecting USB port to another didn't work. However, as I mentioned in the post, after putting AVR libraries I am now experiencing this problem:
auduino_v5.ino: In function 'void audioOn()':
auduino_v5.ino:135:3: error: 'TCCR2A' was not declared in this scope
auduino_v5.ino:135:12: error: 'COM2B1' was not declared in this scope
auduino_v5.ino:135:26: error: 'WGM20' was not declared in this scope
auduino_v5.ino:136:3: error: 'TCCR2B' was not declared in this scope
auduino_v5.ino:136:12: error: 'CS20' was not declared in this scope
auduino_v5.ino:137:3: error: 'TIMSK2' was not declared in this scope
auduino_v5.ino:137:12: error: 'TOIE2' was not declared in this scope
auduino_v5.ino: In function 'void TIMER2_OVF_vect()':
auduino_v5.ino:181:5: error: 'PORTB' was not declared in this scope
auduino_v5.ino:208:3: error: 'OCR2B' was not declared in this scope
Any help is appreciated!