I'm looking to place an order to round out the BOM on the Cascadia and the thought occurred to me that I seem to recall that larger resistors have less thermal noise. Is this still true?
And if I push this further, are 1/8th watt resistors just a stop-gap measure to SM stuff? I've accumulated a turd-ton of 1/8 lately, only because normally you buy in quantities of 100 or so even if you need just slightly more than 10. Economy of scale. But can 1/8 be substituted for 1/4 or is there a reason to stick with 1/4?
Lower wattage resistors can produce more noise in the aggregate but generally the low voltages in guitar pedals (say 9v) this is not such a problem. They are worse for handling current limiting applications (say if you have a large enough current draw through a series resistor).
Here's some good info: http://www.diystompboxes.com/smfforum/index.php?topic=93431.0