Imminence (k_jose_-_imminence.it)
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Imminence Composed by K. Jose May 31, 2021 Another track modeled after Game Boy Advance audio specifications, hopefully a little bit more accurate this time. 2 pulse tones 1 single cycle 32- or 64-sample 4-bit waveform 1 pseudorandom noise 2 8-bit direct sound PCM channels controlled by software (i.e. for software mixing), sample rate also controlled by software mixing to stereo 32768Hz 9-bit by default In my previous track "Enemy Forces" I attenuated the master channel volume of the PSG channels much softer than they should be. The volume envelope thing on the 25% pulse wave here, however, fades out more smoothly than it should. A more accurate representation of the GB volume envelope would take more tracker envelope points than supported. And even with volume ramping completely off, it will not go through each point in sharp steps, rather it would go smoothly. In "Enemy Forces" I used an "MPT hack" to set per-instrument resampling method, which I set at None. Here, I did not use the hack. It's for compatibility with other players and trackers (including the original Impulse Tracker). However, like in "Enemy Forces", I resampled the samples themselves (except PSG) so that at their highest note they max at 16384Hz (or in the case of the Astro Vox sample, 8192 Hz), then resampled all of the samples including PSG without interpolation so that they never play at rates below 44100Hz to maintain the crisp, intentional aliasing effect regardless of the resampling method. To properly conform to A440 tuning, the PSG square, pulse, and single-cycle waveforms have their C5 frequency set to produce a note of A, then the associated tracker instruments are shifted 3 semitones up (C on the instrument will play sample at Eb or D#) to compensate. On the PSG samples, to ensure proper hard right panning, a separate tracker instrument had to be made with a panning envelope set to hard right. I could not use the p64 volume column command because v(number) volume parameters had to be used. The set panning command at XFF does not do proper hard right panning, as there is still output in the left channel. Another set panning command at S8F seems to do the trick on OpenMPT (and apparently IT), but not on some players. All samples except the bass and snare drums, square, 25% pulse, and PSG noise are from KIArchive. Bass and snaredrum samples are from freesound.org users, available under Creative Commons Zero Public Domain Dedication. The Wave PSG sample used on channel 3 of this module is a distorted electric guitar sample converted to a 32-sample-point single cycle waveform and then bitcrushed to 4-bit by attenuating to 25% volume twice, converting to 8-bit (effectively 4-bit due to the low amplitude), and then amplifying by 1600% (16x). Square and pulse drawn by me using OpenMPT's sample editor. PSGNoise samples prepared using the DefleMask chiptune tracker. Recommended playback settings (if your module player or tracker allows): 32000, 32768, or 44100Hz stereo 8- or 9-bit precision via bit crusher effect or output bit depth No volume ramping No interpolation
square square hard right 25 Elec. Gtr. Wave Elec. Gtr. Wave hardright Noise Cymbal lv8 Noise Cymbal lv3 Noise Cymbal lv2 BD Snare Tom Perc Lead Synth Layer Astro Vox Bass square 25 208871__adammusic18__bass Tom 173502__adriak909__dubste Perc Lead Synth Layer B2 Astro Vox Bass
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