Double Bass tunings
The bass keeps two parallel worlds: orchestral tuning in fourths, and the soloist's scordatura a step above it.
Scan a code with your iPhone camera — or open the link — and Nitpitch offers the tuning: load it once, or keep it. Without the app, the link shows the same details you see here.
Solo & alternative tunings
Solo tuning
F♯1 B1 E2 A2
The whole instrument a step up — F♯ B E A. The standard scordatura of the solo repertoire; solo strings are made for it.
https://nitpitch.app/t#djF8ZG91YmxlLWJhc3N8MzAsMzUsNDAsNDV8fHxTb2xvIHR1bmluZw

Fifths tuning
C1 G1 D2 A2
C G D A, an octave below the cello. The Red Mitchell tuning — bigger reach, cello fingerings, and a low C without an extension.
https://nitpitch.app/t#djF8ZG91YmxlLWJhc3N8MjQsMzEsMzgsNDV8fHxGaWZ0aHMgdHVuaW5n
