Test BPM

bpmconfirm.py

import sys
import time


target_str = sys.argv[-1] if len(sys.argv) > 1 else input("target bpm: ")
target = float(target_str)

spb = 1 / target * 60

input("Waiting for start...")

next_ = time.perf_counter()
while True:
    next_ += spb
    print(next_, end="\n\n")
    time.sleep(next_ - time.perf_counter())

bpmtest.py

'''
seconds_per_beat = avg(input_diffs)
beats_per_second = 1/seconds_per_beat
beats_per_minute = beats_per_second * 60
'''
import time


avg = 0
trials = 0
prev = 0

restart_threshold = 1.5

while True:
    input()
    now = time.perf_counter()
    if prev == 0 or now - prev >= restart_threshold:
        prev = now
        avg = 0
        trials = 0
        print("start")
        continue
    avg = (avg * trials + now - prev)/(trials + 1)
    trials += 1
    prev = now
    bpm = 1 / avg * 60
    print(bpm)