Hello, Having just seen some activity here, I want to ask again that my merge request be merged into master. It is a simple change that I personally have been using successfully (although clunky, since I have to rebuild SoX from source whenever I rebuild my app) since last year when it was submitted. The patch allows the RIAA filter to be run on files with 192kHz resolution (an increasingly common sample rate) and already got some approval within this mailing list back then. https://sourceforge.net/p/sox/code/merge-requests/5/ Thanks in advance! Ray