The key of C minor in Bach's oeuvre is not exclusively somber, as it encompasses pieces of a joyful character. Indeed, it would not be inaccurate to perceive it as rather optimistic. This Fantasia is no exception, and can be interpreted as a work reflecting a rather sanguine disposition of Bach.

Consequently, an excessively slow tempo would fundamentally alter the inherent character of this composition. An Allegro tempo is deemed most appropriate.

Therefore, it is recommended that the eighth notes be articulated with staccato. In this context, a light and brief staccato would be more congruent with the piece's character than a heavy or sustained one.

The principal theme is introduced by the right hand in measure 1. Upon its recurrence, this theme should be rendered with distinct clarity. The theme undergoes modulations, appearing in keys such as G minor and E-flat major. Sections beyond the thematic statements predominantly consist of sequences; thus, it is imperative to avoid a monotonous dynamic rendering of these sequences. Instead, both descending and ascending sequential passages should be imbued with directional impetus, and the dynamics of each sequential unit should be varied accordingly.

Regarding the balance between the two voices, audibility is enhanced when one voice consistently maintains a dynamic level either greater or lesser than the other. While a general guideline suggests emphasizing notes of longer duration for clarity, numerous exceptions exist, and the ultimate decision rests with the performer's discretion.

A particularly challenging line occurs in measure 18, presenting technical difficulty due to the crossing of hands. Nevertheless, this passage requires the eighth notes to be articulated with utmost clarity.