diff --git a/constants.py b/constants.py
index ca38957..02576b4 100644
--- a/constants.py
+++ b/constants.py
@@ -30,17 +30,14 @@ class XMLTV:
             open('data/channels.xml', mode='a', encoding='UTF-8').write(c)
 
     def add_programme(self, channel, title, desc, start, stop, category, attr, icon):
-        # TODO: add `duo` attribute (bilingual)
         programme = '<programme start="{} +0000" stop="{} +0000" channel="{}">'.format(start, stop, channel)
         programme += '<title>{}</title>'.format(title)
         programme += '<desc>{}</desc>'.format(desc)
         programme += '<category lang="ja">{}</category>'.format(category)
         if icon: programme += '<icon src="{}" />'.format(icon)
-        if '5.1' in attr: programme += '<audio><stereo>surround</stereo></audio>'
         if 'stereo' in attr: programme += '<audio><stereo>stereo</stereo></audio>'
         if 'mono' in attr: programme += '<audio><stereo>mono</stereo></audio>'
         if 'hd' in attr: programme += '<video><present>yes</present><aspect>16:9</aspect><quality>HDTV</quality></video>'
-        if '4k' in attr: programme += '<video><present>yes></present><aspect>16:9</aspect><quality>3840x2160</quality></video>'
         if 'cp1' in attr: programme += '<subtitles type="teletext" />'
         programme += '</programme>\n'