An element present in some [[ClassicalMusic classical]] and popular music pieces is wherein the bass line (the lowest line of notes, usually played by the bass guitar, the string basses, or the left hand of a keyboardist) slowly descends.

Often used as a type of {{ostinato}}i.e., as a repeated figure against which other music is set, such as a varying {{melody}} line.

There are two versions:
* ''Diatonic'': along the scale in the key of the music. Usually, this starts on "do", so we're talking "do, ti, la, so, etc." in the bass line.
* ''Chromatic'': along the ChromaticScale (i.e., including the notes between ti and la, la and so, etc.) from the home note of the [[{{tonality}} key]] to some other note. Usually, it goes down to the fifth scale degree (i.e. "so").

In both cases, there are usually a standard {{Chord Progression}}s that go along with such sequences.
* For diatonic sequences: [=I, V6, vi, V or iii6, IV, I6, ii, V=] in a major key, and [=i, VII or v6, VI, v or III6, iv, I6, ii° or ii or II, V=], possibly with [[{{harmony}} sevenths]] on the chords. Note that this is actually ''very'' close to the PachelbelsCanonProgression, which may have evolved from it. The bass line goes "do, ti, la, so, fa, mi, re, so"; yes, the last note isn't quite "falling", but that's how it usually works.
* For chromatic sequences: [=I, V6, Ib7 or bVII, IV6, iv6, and I64 or V=] in major keys, substitute i for I and the last chord could also be [=III6=] in minor keys (where the iv6 may also be replaced with an [[ augmented sixth chord]]). In pop chord notation, in the key of C major, that would be [=C, G/B, C7/Bb; or Bb, F/A, Fm/Ab, C/G or G=]. You can see the bottom note going [=C-B-Bb-A-Ab-G=]; that's the essence of this trope. After hitting the fifth scale degree ("so"), other bass motion usually happens, but it's usually chromatic down to the "so". Back in the ''{{Baroque|Music}}'' era, the chromatic Falling Bass was often used to depict (and interpreted as depicting) suffering. But back then, and during the ClassicalEra and RomanticEra, another progression for this same bass line was popular, which involved a lot of {{diminished seventh}} chords.

No, not [[IncrediblyLamePun an instrument dropped out a 10-story window]]. That would just be "[[NotTheFallThatKillsYou crashing bass]]".

This also [[JustForFun/IThoughtItMeant nothing]] to do with [[{{Dubstep}} "dropping the bass"]].

''It is requested that you add examples in chronological order.''
!!Diatonic examples:

* Procol Harum's "A Whiter Shade of Pale"
* Music/TheZombies' "Care of Cell 44": The verses alternate between the standard progression ([=I, V6, vi, V, IV, I6, ii, V=]) and a subversion ([=I, V6, ♭III4, ii7, V, V7=]). The chorus also uses a descending pattern played under the [=vi=] and [=V=] chords.
* Music/JohnLennon, "Mind Games"
* Music/JimCroce's "Time in a Bottle" features three different variations of the Falling Bass. The first line of the verse is chromatic: D-C#-C-B-Bb-A. The second line switches to a minor diatonic scale: D-C-Bb-A-G-F. The chorus then runs the complete major diatonic scale: D-C#-B-A-G-F#-E
* Music/{{Queen}}: a lot of their songs feature bass going progressively downward from root to seventh to sixth in an I-V-vi progression. See Bohemian Rhapsody, the ballad section, for an example of this.
* Music/BillyJoel, "PianoMan". [=I, V6, IV6, I64, IV, I6, II7, V=] in C major.
* The intro to ''VideoGame/MegaMan4'' has basically this sequence, except that the sixth note is not scale degree 3 but scale degree 1.
* In ''VideoGame/MegaManZX'', "[[ En-trance Code]]", the music in trans server rooms, starts with this sequence, in C minor.
* "The Man I Love" by George and Ira Gershwin begins with a variation: [=I, i, v6, VI7=].

!!Chromatic examples:

* The example in every music theory student's textbook: the aria "[[ Dido's Lament]]" from HenryPurcell's opera ''DidoAndAeneas''. In G minor.
* The "[[ Crucifixus]]" from the Mass in B minor by Music/JohannSebastianBach uses this as a four-bar ostinato bass-line pattern, in E minor. This was lifted from the cantata "Weinen, Klagen, Sorgen, Zagen," which had it in F minor (as do Liszt's variations for piano and organ based on it).
* Music/LudwigVanBeethoven's "Waldstein Sonata", at the very beginning of the first movement. In C major.
** Beethoven's Variations on an Original Theme in C minor ([=WoO=] 80) makes even more obvious use of this. The theme breaks rhythm dramatically in the sixth bar (of eight) after the chromatically descending progression reaches G.
* Music/FryderykChopin's [[ Prelude in E minor]] from his set of 24 preludes in each key uses this, though it starts on the third scale degree and has a bunch of unusual chords.
* "These Boots Are Made for Walkin'", written by Lee Hazlewood and recorded by Nancy Sinatra.
** Technically speaking, "These Boots" is a subversion of the chromatic scale because if you listen carefully, upright bass player Chuck Berghofer is playing in microtonal increments that are smaller than semitones; according to [[ the Other Wiki]], Lee Hazlewood specifically asked him to do this.
* The verse of Music/TheBeatles' "[[Music/SgtPeppersLonelyHeartsClubBand Lucy In The Sky With Diamonds]]" has a version that skips from the first to the third note in the usual sequence.
* The Music/{{Eagles}}' famous song "Hotel California" has an interesting subversion of this: The verse's chord progression is typical of the Falling Bass, but it keeps all the chords in root position. The result is this: [=Bm, F#, A, E7, G, D, Em, F#=].
** Same with Music/{{Wings}}'s "Mamunia."
* ''WesternAnimation/SchoolhouseRock'': "[[ Figure Eight]]", the middle major-key section. (Also an example of an A-B-A form song.) This goes down to scale degree two ("re"), giving us [=C, G/B, C7/Bb, F/A, Fm/Ab, C/G, F#hdim7 (F#m7b5), Bdim7/F, C/E, D#dim7 Dmin7 G7 C=].
* The opening theme of ''VideoGame/{{Mother|1}}'', "Mother Earth", only uses four steps of the chromatic sequence faithfully, but it's still using the technique for its poignance.
* The third opening theme of ''Manga/MagicKnightRayearth'' is similar to HotelCalifornia in that it features a chord progression typical of the Falling Bass but has the chords in root position.
* RitsukoOkazaki's song "[[ fay]]", in the verse. This song is in G major, and the progression is [=G, D/F#, G7/F, C/E, Cm/Eb, G/D, D=].
* The bassline of the "[[ Alternia]]" theme (see ''{{Webcomic/Homestuck}}'') takes the five incremental half-steps down to ''so'' before taking a half-step up and a whole step up. The composer fully admits to the influence of ''VideoGame/{{Mother|1}}'' and ''VideoGame/{{EarthBound}}'', and this song is likely inspired by the "Mother Earth" theme (search above).
* "I Think I Love You" by David Cassidy.
* In Antonio Vivaldi's violin concerto "Il piacere" (Op. 8 No. 6), the unison ritornello of the slow movement is a chromatic descent from the tonic to the fifth.
* Music/EdvardGrieg's Ballade for piano (Op. 24) doesn't use the standard chord progression, but the bass line of its theme begins by monotonically descending, for eight bars minus an upbeat, from the E-flat above the bass clef to the G below it. The first variation begins similarly.
* The in-game theme of ''VideoGame/TransformersConvoyNoNazo'' features a bass line descending from the tonic of C to B to B-flat to A to A-flat, but then going back up to C by way of B-flat.
* Chromatic variant in "Mr. Businessman" by Music/RayStevens. The first stanza of the song has a descending line of E-[=Emaj7=]/D♯-E7/D-A/C♯-Am/C-B7, played on a piano.
* "Can't Take My Eyes Off Of You" by Frankie Valli carries the chromatic progression beyond its usual endpoint for the first strain, but holds the actual bassline on a pedal point.