for (i, band_env) in envelope[..num_env_bands].iter_mut().enumerate() {
let delta = br.read_cb(t_cb)?;
let last = match (freq_res, chan.last_freq_res) {
for (i, band_env) in envelope[..num_env_bands].iter_mut().enumerate() {
let delta = br.read_cb(t_cb)?;
let last = match (freq_res, chan.last_freq_res) {