You may obtain free recording studio software for your PC. There is no any online software which can serve as recording studio. Your computer should have Microphone and Line-In ports on the Audio Card. If not, you should purchase and install a compatible audio card for your hardware. Then you may connect input amplifiers or microphones to audio card. Some musical instrument produce Line Out
. signal which can be connected to Line-In of the audio card. Audacity is one of the popular and free audio recording software. You can obtain it from their official website. It provides many features to record and optimize audio clippings. Recorded clipping can be exported to required media file format such as wav or mp3. The software works on all kind of computers and needs less system resources. Obviously you need to invest in recording equipments like amplifier, microphone and selectors. Ideally, room should have no external noise for error free recording.