phschoen: add volume override per artist

osci-pi.py

 songlist = None
 currentfile = None
 lasttime = None
+currvol = basevol
+
+vol_list = [
+    ("Harley_Matthews", "100"),
+]
+
 
 basedir = sys.argv[1]
 if basedir.endswith("/"):
     basedir = basedir.removesuffix("/")
 
 def get_artist(fn):
+    global currvol
     parts = fn.replace(basedir + "/", "").split(os.sep)
     artist = parts[0].replace("_", " ")
+    currvol = basevol
+    for i in vol_list:
+        if i[0] in fn:
+            currvol = i[1]
+            break
     return artist
 
 #originalsongs = os.listdir(basedir)
     currentfile = filename
     status(currentfile)
 
-    currentplaying = subprocess.Popen(["ffplay", "-hide_banner", "-nostats", "-nodisp", "-autoexit", "-volume", basevol, filename])
+    print("volume %s " %  currvol)
+    currentplaying = subprocess.Popen(["ffplay", "-hide_banner", "-nostats", "-nodisp", "-autoexit", "-volume", currvol, filename])
 
 def running():
     global currentplaying