Yonac have just released an update for the new and rather fab Tonestack modeling App. This updates it to version 1.1 and adds…

• More robust audio subsystem
• Increased bottom-end response for amps
• Enhancements to amp tonestack behavior
• All amps also get ~3dB output volume increase
• Latest Audiobus SDK – now iOS 8 compatible
• Many other improvements & fixes

So if your bottom needs more response, update Tonestack, it makes a beautiful thing, er, beautifuler.