The spelling of "BSCBISPA" can be explained using the International Phonetic Alphabet (IPA). The first letter, "B", corresponds to the voiced bilabial stop sound /b/. The following letters, "SC", represent the sound /sk/, which is a voiceless alveolar-palatal fricative. Next, "BI" is pronounced as a long /i:/ vowel sound. The letter "S" then represents the voiceless alveolar fricative sound /s/, followed by "P", the voiceless bilabial stop sound /p/. Finally, the letter "A" corresponds to the short /æ/ vowel sound. Therefore, the proper pronunciation of "BSCBISPA" is /b sk i: s p æ/.