Increase range of visualizer_spectrum_dft_size

doc/config

@@ -105,11 +105,11 @@
 #
 #visualizer_spectrum_smooth_look = yes
 #
-## A value between 0 and 4 inclusive. Specifying a larger value makes the
+## A value between 1 and 7 inclusive. Specifying a larger value makes the
 ## visualizer look at a larger slice of time, which results in less jumpy
 ## visualizer output.
 #
-#visualizer_spectrum_dft_size = 2
+#visualizer_spectrum_dft_size = 4
 #
 #visualizer_spectrum_gain = 20
 #

doc/ncmpcpp.1

@@ -107,7 +107,7 @@ Automatically scale visualizer size.
 For spectrum visualizer, use unicode block characters for a smoother, more continuous look. This will override the visualizer_look option. With transparent terminals and visualizer_in_stereo set, artifacts may be visible on the bottom half of the visualization.
 .TP
 .B visualizer_spectrum_dft_size = NUMBER
-For spectrum visualizer, a value between 0 and 4 inclusive. Specifying a larger value makes the visualizer look at a larger slice of time, which results in less jumpy visualizer output.
+For spectrum visualizer, a value between 1 and 7 inclusive. Specifying a larger value makes the visualizer look at a larger slice of time, which results in less jumpy visualizer output.
 .TP
 .B visualizer_spectrum_gain = dB
 Gain for spectrum visualizer in dB, larger/smaller values shift bars up/down.

src/settings.cpp

@@ -296,10 +296,10 @@ bool Configuration::read(const std::vector<std::string> &config_paths, bool igno
 	p.add("visualizer_autoscale", &visualizer_autoscale, "no", yes_no);
 	p.add("visualizer_spectrum_smooth_look", &visualizer_spectrum_smooth_look, "yes", yes_no);
 	p.add("visualizer_spectrum_dft_size", &visualizer_spectrum_dft_size,
-			"2", [](std::string v) {
+			"4", [](std::string v) {
       uint32_t result = verbose_lexical_cast<uint32_t>(v);
-      boundsCheck<uint32_t>(result, 0, 4);
+      boundsCheck<uint32_t>(result, 1, 7);
-			return result + 14;
+			return result + 11;
 			});
 	p.add("visualizer_spectrum_gain", &visualizer_spectrum_gain,
 			"20", [](std::string v) {