ๆใใใ
็งใฎ 440Hz ใฏใ439Hzใใงใใ๏ผใใชใใ้ณๆใใในใใใใ๏ผ https://pitch-test.now.sh/ #440Hzใๅฝใฆใใใค
ๅฟๅฎใใใๅ ดใ็ฎๆใใฆใใพใใๅค้จใใใฎใคใธใซใฏๅฎน่ตฆใใพใใใ
โปๅฎๅ
จๆๅพ
ๅถใงใใใ่ๅณใฎใใๆนใ็ฎก็่
ใพใงใๆฐ่ปฝใซใๅใๅใใใใ ใใใ
ใใใใใใญใใใใพใใ