Writing a four part piece for strings at a very slow tempo (55 bpm). On paper, it seems as though the non-chord notes I have selected should work, but I am finding some of them jarring. I am unsure if the problem is down to the slow tempo, and therefore the inevitable longer duration of the dissonances, or whether there is some other problem.
The bars concerned are the last two in the picture.
The harmony over the two bars is FM (IV 64) and F sharp dim triad, also in second inversion, as I am using C as a pedal point.
The first bar (FM 64), we have a passing note in the alto. This forms a 7th dissonance with the bass (2 bass parts here, both in bass clef), a sharp 4 dissonance with the tenor (alto clef), and a minor second dissonance with the soprano. Each dissonance is resolved to a consonance on the next beat (Bass octave, tenor P5 and soprano M6), but still doesn't seem quite right. Out of the two bars, this one is the least jarring, but I am still unsure about it.
the second bar (F sharp dim triad 64-last bar on the page) presents more of a problem. To go with the D escape note in the soprano part, I thought I would put in a B auxiliary note (highlighted) in the alto. I know that decorative notes should sound in 3rds/6ths with each other, and these form a minor third. However, perhaps down to the tempo, this seems to change the harmony to B minor for the listener, and does not sound right at all. Is this simply down to the tempo, or has a different mistake been made?
Thanks for your help!