now for more

Author: noriah

README.md

@@ -5,13 +5,20 @@ tavis
 [![made-with-go][withgo]][go-dev]
 [![betamax-was-a-thing][betamax]][betawhat]
 
-### terminal audio visualizer for linux/unix/macOS/windows*
-*windows needs work
+> terminal audio visualizer for linux/unix/macOS/windows*
+
+<p align="center">
+	<a href="https://www.youtube.com/watch?v=NGtCoEsgJww" target="_blank">
+		<img src="../media/preview0.gif?raw=true"/>
+	</a>
+</p>
 
 ## early development - expect things to change and break
 
 we are working on this project all the time. its a sort of time filler for us at this point. expect lots of additions and changes at random times.
 
+*windows needs work
+
 ## supported audio backends
 - PortAudio (linux/macOS/*windblows**)
 - PulseAudio (parec/FFmpeg)
@@ -88,7 +95,9 @@ COMMANDS:
 [go-dev]: https://go.dev
 [betawhat]: https://google.com/search?q=betamax
 
+
 <!-- Images -->
 [withlove]: https://forthebadge.com/images/badges/built-with-love.svg
 [withgo]: https://forthebadge.com/images/badges/made-with-go.svg
 [betamax]: https://forthebadge.com/images/badges/compatibility-betamax.svg
+

dsp/spectrum.go

@@ -133,7 +133,7 @@ func (sp *Spectrum) Process(win window.Function) {
 
 	sf = math.Pow(sf, float64(sp.sampleSize)/sp.sampleRate)
 
-	var bassCut = sp.freqToIdx(Frequencies[2], math.Round)
+	var bassCut = sp.freqToIdx(Frequencies[2], math.Ceil)
 	var fBassCut = float64(bassCut)
 
 	for _, stream := range sp.streams {
@@ -233,11 +233,14 @@ func (sp *Spectrum) distributeLog(bins int) {
 	var lo = (Frequencies[1])
 	var hi = Frequencies[4]
 
-	var cF = math.Log10(lo/hi) / ((1 / float64(bins)) - 1)
+	var loLog = math.Log10(lo)
+	var hiLog = math.Log10(hi)
+
+	var cF = (hiLog - loLog) / float64(bins)
 
 	var getBinBase = func(b int) int {
-		var vFreq = ((float64(b) / float64(bins)) * cF) - cF
-		vFreq = math.Pow(10.0, vFreq) * hi
+		var vFreq = ((float64(b) * cF) + loLog)
+		vFreq = math.Pow(10.0, vFreq)
 		return sp.freqToIdx(vFreq, math.Floor)
 	}
 
@@ -262,7 +265,7 @@ func (sp *Spectrum) distributeEqual(bins int) {
 	var loF = Frequencies[0]
 	var hiF = math.Min(Frequencies[4], sp.sampleRate/2)
 	var minIdx = sp.freqToIdx(loF, math.Floor)
-	var maxIdx = sp.freqToIdx(hiF, math.Ceil)
+	var maxIdx = sp.freqToIdx(hiF, math.Round)
 
 	var size = maxIdx - minIdx