A thread elsewhere about dehumidifiers inspired me to post this recent observation here... My Nagra V/Schoeps MS rig and I have made many recordings in the Himalayas, where the high altitude and cold air mean there is very little humidity at all. Photographs of distant objects remain clear and distinct due to the lack of 'haze-creating' moisture in the air. Likewise, sound recordings made there, especially outdoors, are always very crisp and clear, and sounds from considerable distances are rendered with remarkable clarity. I have also made recordings in and around the low-lying Terai regions of Nepal, where it can get quite humid, and noticed a difference in tone to the Tibet recordings. But I never thought much of it until now - over the last week or so I've been making recordings in Sarawak (Malaysian Borneo), where it is currently *very* humid. The Borneo recordings do not have the crispness of the Tibetan recordings, nor do they sound like the low lying Nepalese recordings. They all sound warmer and more 'liquid' (back in your box, you cursed inner audiophile!), as if someone has put a gentle Baxandall HF roll-off on everything - beginning at around 3kHz and dropping 3dB or so at 20kHz. It's not at all dull, just sweet and warm. Everything I have recorded here so far has this over-riding tonality. Same recording gear, of course. I find it fascinating to contemplate, and can think of many musicians who'd like to put this 'Borneo' tone over their recordings. Perhaps it's time to start working on the 'Humidifier' plug-in, and load it up with a bunch of Geographical Location Options and a Google Earth link?