Zenn
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SpotifyのAPIを使ってみる

nabetsunabetsu

アカウントの作成

自分の場合は登録済みだったので、SpotifyのIDとパスワードでそのままログインした。

Developer PortalでAppの作成

APIを利用するにはAppの作成をDeveloper Portalから行う必要がある。

具体的な手順は以下の記事が詳しいので、これを参考に。
Spotify Developer Platform: Spotify APIアクセスしてデータ取得してみてみた - Qiita

Appの作成が完了すると以下のような画面が表示され、AppにアクセスするとClientIDとClientSecretが発行されている。

参考資料

nabetsunabetsu

Audio Features

// json response

{
    "danceability": 0.735,
    "energy": 0.578,
    "key": 5,
    "loudness": -11.84,
    "mode": 0,
    "speechiness": 0.0461,
    "acousticness": 0.514,
    "instrumentalness": 0.0902,
    "liveness": 0.159,
    "valence": 0.624,
    "tempo": 98.002,
    "type": "audio_features",
    "id": "06AKEBrKUckW0KREUWRnvT",
    "uri": "spotify:track:06AKEBrKUckW0KREUWRnvT",
    "track_href": "https://api.spotify.com/v1/tracks/06AKEBrKUckW0KREUWRnvT",
    "analysis_url": "https://api.spotify.com/v1/audio-analysis/06AKEBrKUckW0KREUWRnvT",
    "duration_ms": 255349,
    "time_signature": 4
}

Audio Analysis

https://developer.spotify.com/documentation/web-api/reference/#endpoint-get-audio-analysis

// json response
{
    "bars": [
        {
            "start": 251.98282,
            "duration": 0.29765,
            "confidence": 0.652
        }
    ],
    "beats": [
        {
            "start": 251.98282,
            "duration": 0.29765,
            "confidence": 0.652
        }
    ],
    "meta": {
        "analyzer_version": "4.0.0",
        "platform": "Linux",
        "detailed_status": "OK",
        "status_code": 0,
        "timestamp": 1456010389,
        "analysis_time": 9.1394,
        "input_process": "libvorbisfile L+R 44100->22050"
    },
    "sections": [
        {
            "start": 237.02356,
            "duration": 18.32542,
            "confidence": 1,
            "loudness": -20.074,
            "tempo": 98.253,
            "tempo_confidence": 0.767,
            "key": 5,
            "key_confidence": 0.327,
            "mode": 1,
            "mode_confidence": 0.566,
            "time_signature": 4,
            "time_signature_confidence": 1
        }
    ],
    "segments": [
        {
            "start": 252.15601,
            "duration": 3.19297,
            "confidence": 0.522,
            "loudness_start": -23.356,
            "loudness_max_time": 0.06971,
            "loudness_max": -18.121,
            "loudness_end": -60,
            "pitches": [
                0.709,
                0.092,
                0.196,
                0.084,
                0.352,
                0.134,
                0.161,
                1,
                0.17,
                0.161,
                0.211,
                0.15
            ],
            "timbre": [
                23.312,
                -7.374,
                -45.719,
                294.874,
                51.869,
                -79.384,
                -89.048,
                143.322,
                -4.676,
                -51.303,
                -33.274,
                -19.037
            ]
        }
    ],
    "tatums": [
        {
            "start": 251.98282,
            "duration": 0.29765,
            "confidence": 0.652
        }
    ],
    "track": {
        "duration": 255.34898,
        "sample_md5": "",
        "offset_seconds": 0,
        "window_seconds": 0,
        "analysis_sample_rate": 22050,
        "analysis_channels": 1,
        "end_of_fade_in": 0,
        "start_of_fade_out": 251.73333,
        "loudness": -11.84,
        "tempo": 98.002,
        "tempo_confidence": 0.423,
        "time_signature": 4,
        "time_signature_confidence": 1,
        "key": 5,
        "key_confidence": 0.36,
        "mode": 0,
        "mode_confidence": 0.414,
        "codestring": "eJxVnAmS5DgOBL-ST-B9_P9j4x7M6qoxW9tpsZQSCeI...",
        "code_version": 3.15,
        "echoprintstring": "eJzlvQmSHDmStHslxw4cB-v9j_A-tahhVKV0IH9...",
        "echoprint_version": 4.12,
        "synchstring": "eJx1mIlx7ToORFNRCCK455_YoE9Dtt-vmrKsK3EBsTY...",
        "synch_version": 1,
        "rhythmstring": "eJyNXAmOLT2r28pZQuZh_xv7g21Iqu_3pCd160xV...",
        "rhythm_version": 1
    }
}