18-Aug-2015, 17:42
AudioTools by Studio Six Digital. It is an iOS app BUT it has many add on tools that can make as professional as you wish. I find that it is accurate enough for my purposes. If you wish for more accuracy, they also sell a microphone.
Synology 713+ -> Aurender N10 -> D 200 -> Legacy Audio Focus SE speakers. ClearAudio Emotion TT. Synergistic Atmosphere Level 3 UEF Speaker and Galileo (USB) Interconnects and Synergistic PowerCell UEF S - Virginia U. S. A.