Dean, Not sure about these but in GoldWave, it works well as I can attest from trying the following, sent me a considerable while ago when I had some minidisk recordings of Strangers and Brothers I needed to digitize and could not reduce the bass on the player.
I suggest contact the sender and ask for his sample, for I no longer possess what he sent. A message about removing excessive bass in GoldWave. To: "BCAB Discussion List" <b...@lists.bcab.org.uk> Subject: Re: [BCAB] Please can anybody suggest how I remove the bass? From: "Norman Octon" <nor...@octon2002.f2s.com> Date: Sat, 3 Dec 2011 16:45:49 -0000 Hi Colin, I don't know about the high pass filter, but I have found a different solution which sounds fantastic to my ear. In goldwave, go to Effects, Filter, Equalizer. From the presets, select Inverse RIAA EQ curve. The effect was to remove too much base and boost the treble too much, so I modified the numbers a bit. I'll send you my result. Colin Howard, who, by the Lord's providence has lived at his present address near Fareham in Southern England, since February 1992 and though Southern England, including parts of Hampshire suffer floods from this current stormy weather, because living about 200 feet above sea level, no problems so far and hopes not to move in the near future.