On Fri, Aug 28, 2009 at 07:34:20PM +1000, cal wrote: I use something like 1e-20f, which is 400dB below normal levels and unlikely to cause any problem. The trick is to apply it at the right place. In almost all cases where denormals turn up it is the result of having some delay line with feedback, causing values to decay exponentially when there is no signal. The right place to insert the DC bias is at the input of the delay line. A 'delay line' can be as simple as for () { ... x = x * 0.9f; ... } where x is a one-element delay, so this would become x = x * 0.9f + 1e-20f; Ciao, -- FA Io lo dico sempre: l'Italia è troppo stretta e lunga.