The most common problem in audio recordings is the loss of audio quality that does not match the original. Users blame the software and hardware for this, but in fact this is due to incorrect settings. Of course, part of the blame lies with the developers, who have made the graphical interface too complicated and have not attached clear instructions to the program. Our i-Sound Recorder allows you to record any sound from your computer with a bit-perfect quality and even improve the quality of recording by removing background noise. Below you will find some useful tips on setting up a recorder.
1 Volume Level
Do not neglect the recording level as it is responsible for the dynamic range of the sound. If the volume level is too low, then the quiet parts of the song will simply be lost, and if the recording level is too high, then clipping will occur. You will get recordings that sound 'weak' or 'small' or too dense or 'just not pro enough'. Setting the recording level to 70% by the VU-meter will take the first step in the right direction.
2 Recording Format
Record settings are defined by three main parameters - the sampling rate, the number of channels and bit resolution. For example, for Audio CD it is 44100Hz, Stereo, 16-bit. We will not go into details, all you need to know is one thing - the recording parameters must match the original. Setting higher values will not increase the quality, but will only increase the file size.
However, there is also a system audio format in Windows. If you didn't know yet, all audio streams and system sounds are mixed into this format before playback. Even if you listen to high-resolution music, its quality will correspond to the system quality settings, which by default are set to 16 bits, 48000 Hz (DVD Quality). Never forget that!
3 Compression Options
With the compression settings, everything is quite simple. We all know and love the MP3 format, it is widely distributed and supported by all operating systems and mobile devices. Feel free to choose a bitrate of 160kb and higher, depending on the streaming service.
If we are talking about high-resolution music, then there is not much choice either. The most advanced and common lossless compression format is FLAC. This format is used to capture music from Tidal and allows you to get bit-perfect copies of the original song.
4 Quality Improvements
First of all I want to warn you: never use equalizers, filters and other sound enhancers during high-quality audio recording. Any changes you want, you can make after the end of the recording, using the audio editor. The following recommendations apply only to low-quality audio recordings, such as voice recordings in a noisy room.
So, during the audio recording there are strong noises and we need to do something about it. In this case, you can use two approaches. If we know the frequency range of the useful signal, then we can trim all the excess using filters. For example, for the human voice, the frequency band ranges from approximately 300 Hz to 3400 Hz, so we can use the High-Pass and Low-Pass filters tuned to these frequencies. In another case, we can know the frequency of the noise and can suppress it. The most common noise of this type during recording is interference from electrical wiring at 60 or 50 Hz. They can be safely removed using a Notch filter.