Windows:
OS: Windows 10 Home Edition
Processor: Intel i5, 2.60 GHz
RAM: 8 GB
System: 64 bit, HP Envy Laptop
Audacity:
v 2.1.0
.EXE installer
Problem: Variation in amplitude of recorded audio after saving as “.wav”.
Description: I use audacity solely to capture 33 1/3 RPM vinyl recordings and save them in .wav format. Audio path is turntable via a stand-alone pre-amp then through a Behringer UF0202 interface to the laptop’s USB input.
Audacity settings:
Audio host: MME
Recording device: Microphone (USB audio codex)
Recording channels: 2 (Stereo)
Playback device: Speakers / HP (IDT high definition)
File save settings: Export Multiple, WAV format
After saving the file(s) in WAV format I play the file using either the Windows media player or iTunes. Using either player the recording exhibits a variation in volume during its entire play time. That is, there is a cyclical slight decrease then slight increase in volume while the recording is playing. The variation occurs in 2 to 5 second cycles. The variation is NOT present in the audio as monitored via headphones attached to the Behringer UF0202 during recording, nor is it present when the vinyl is played via the analog pre-amp, amp and speakers. Thus I feel certain that the problem does not lie in the turntable, pre-amp or in the Behringer UF0202.
I would greatly appreciate hearing from anyone who can tell me how to eliminate this problem as the constantly recurring volume increases and decreases make the wav files unlistenable.
Thank you,
John