The schematic in the linked article shows an NE5532.
Only in the first two stages. Output stage is LM386 which will be the source of the most of the noise. Replace the LM386 with another NE5532 (but modify the schematic of course, LM386 is single audio amp and has different pinout)
alt Hacker News
Only in the first two stages. Output stage is LM386 which will be the source of the most of the noise. Replace the LM386 with another NE5532 (but modify the schematic of course, LM386 is single audio amp and has different pinout)