The conversation between human and AI assistant.
[|Human|] Please give a summary of the type of recordings Spalding made by year.
[|AI|] 1925: Vertically-cut acoustic recordings
1926: First electrical recordings for Brunswick Records
1928: Electrical recordings using Edison hill-and-dale Diamond Discs and "Needle Cut" recordings.
[|Human|] 
Please give a summary of the type of recordings Spalding made by year.